diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index 3fae28be2bec..c0cfcf412c5e 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -153,15 +153,9 @@ stdenv.mkDerivation rec {
   ]
   ++ lib.optionals (!isTorBrowserLike) [
     "-I${nss.dev}/include/nss"
-  ]
-  ++ lib.optional stdenv.isDarwin [
-    "-isystem ${llvmPackages.libcxx}/include/c++/v1"
-    "-DMAC_OS_X_VERSION_MAX_ALLOWED=MAC_OS_X_VERSION_10_10"
   ];
 
-  postPatch = lib.optionalString stdenv.isDarwin ''
-    substituteInPlace js/src/jsmath.cpp --replace 'defined(HAVE___SINCOS)' 0
-  '' + lib.optionalString (lib.versionAtLeast ffversion "63.0" && !isTorBrowserLike) ''
+  postPatch = lib.optionalString (lib.versionAtLeast ffversion "63.0" && !isTorBrowserLike) ''
     substituteInPlace third_party/prio/prio/rand.c --replace 'nspr/prinit.h' 'prinit.h'
   '';
 
diff --git a/pkgs/development/compilers/llvm/7/compiler-rt-clock_gettime.patch b/pkgs/development/compilers/llvm/7/compiler-rt-clock_gettime.patch
deleted file mode 100644
index f9323ed95c05..000000000000
--- a/pkgs/development/compilers/llvm/7/compiler-rt-clock_gettime.patch
+++ /dev/null
@@ -1,74 +0,0 @@
-commit f00c7bccf7955b7dfbb4859fd9019e9eb3349f2d
-Author: Tobias Mayer <tobim@fastmail.fm>
-Date:   Wed Feb 13 12:44:17 2019 +0100
-
-    Provide clock_gettime for xray on macos < 10.12
-
-diff --git a/lib/xray/xray_basic_logging.cc b/lib/xray/xray_basic_logging.cc
-index a46c151af..38aea6932 100644
---- a/lib/xray/xray_basic_logging.cc
-+++ b/lib/xray/xray_basic_logging.cc
-@@ -36,6 +36,29 @@
- #include "xray_tsc.h"
- #include "xray_utils.h"
- 
-+#if __MACH__
-+#include <mach/clock.h>
-+#include <mach/mach.h>
-+enum clockid_t {
-+    CLOCK_MONOTONIC = REALTIME_CLOCK,
-+    CLOCK_REALTIME = REALTIME_CLOCK
-+};
-+
-+int clock_gettime(clockid_t clock_id, struct timespec *ts) {
-+  if (ts != NULL) {
-+      clock_serv_t cclock;
-+      mach_timespec_t mts;
-+      host_get_clock_service(mach_host_self(), clock_id, &cclock);
-+      clock_get_time(cclock, &mts);
-+      mach_port_deallocate(mach_task_self(), cclock);
-+      ts->tv_sec = mts.tv_sec;
-+      ts->tv_nsec = mts.tv_nsec;
-+      return 0;
-+  }
-+  return -1;
-+}
-+#endif
-+
- namespace __xray {
- 
- SpinMutex LogMutex;
-diff --git a/lib/xray/xray_fdr_logging.cc b/lib/xray/xray_fdr_logging.cc
-index 4b308b27f..1d044c8fd 100644
---- a/lib/xray/xray_fdr_logging.cc
-+++ b/lib/xray/xray_fdr_logging.cc
-@@ -38,6 +38,29 @@
- #include "xray_tsc.h"
- #include "xray_utils.h"
- 
-+#if __MACH__
-+#include <mach/clock.h>
-+#include <mach/mach.h>
-+enum clockid_t {
-+    CLOCK_MONOTONIC = REALTIME_CLOCK,
-+    CLOCK_REALTIME = REALTIME_CLOCK
-+};
-+
-+int clock_gettime(clockid_t clock_id, struct timespec *ts) {
-+  if (ts != NULL) {
-+      clock_serv_t cclock;
-+      mach_timespec_t mts;
-+      host_get_clock_service(mach_host_self(), clock_id, &cclock);
-+      clock_get_time(cclock, &mts);
-+      mach_port_deallocate(mach_task_self(), cclock);
-+      ts->tv_sec = mts.tv_sec;
-+      ts->tv_nsec = mts.tv_nsec;
-+      return 0;
-+  }
-+  return -1;
-+}
-+#endif
-+
- namespace __xray {
- 
- atomic_sint32_t LoggingStatus = {XRayLogInitStatus::XRAY_LOG_UNINITIALIZED};
diff --git a/pkgs/development/compilers/llvm/7/compiler-rt.nix b/pkgs/development/compilers/llvm/7/compiler-rt.nix
index b44ba62ee924..de312468c541 100644
--- a/pkgs/development/compilers/llvm/7/compiler-rt.nix
+++ b/pkgs/development/compilers/llvm/7/compiler-rt.nix
@@ -26,9 +26,8 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./compiler-rt-codesign.patch # Revert compiler-rt commit that makes codesign mandatory
-  ] ++ stdenv.lib.optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch
-    ++ stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) ./crtbegin-and-end.patch
-    ++ stdenv.lib.optional stdenv.hostPlatform.isDarwin ./compiler-rt-clock_gettime.patch;
+  ] ++ stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) ./crtbegin-and-end.patch
+    ++ stdenv.lib.optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch;
 
   # TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
   # to get it, but they're unfree. Since LLVM is rather central to the stdenv, we patch out TSAN support so that Hydra
diff --git a/pkgs/development/libraries/libdrm/default.nix b/pkgs/development/libraries/libdrm/default.nix
index a0bd7d864548..a8daf5754165 100644
--- a/pkgs/development/libraries/libdrm/default.nix
+++ b/pkgs/development/libraries/libdrm/default.nix
@@ -14,17 +14,12 @@ stdenv.mkDerivation rec {
   buildInputs = [ libpthreadstubs libpciaccess valgrind-light ];
     # libdrm as of 2.4.70 does not actually do anything with udev.
 
-  patches = stdenv.lib.optional stdenv.isDarwin ./libdrm-apple.patch;
-
   postPatch = ''
     for a in */*-symbol-check ; do
       patchShebangs $a
     done
   '';
 
-  preConfigure = stdenv.lib.optionalString stdenv.isDarwin
-    "echo : \\\${ac_cv_func_clock_gettime=\'yes\'} > config.cache";
-
   configureFlags = [ "--enable-install-test-programs" ]
     ++ stdenv.lib.optionals (stdenv.isAarch32 || stdenv.isAarch64)
       [ "--enable-tegra-experimental-api" "--enable-etnaviv-experimental-api" ]
diff --git a/pkgs/development/libraries/libdrm/libdrm-apple.patch b/pkgs/development/libraries/libdrm/libdrm-apple.patch
deleted file mode 100644
index 17b447789c2f..000000000000
--- a/pkgs/development/libraries/libdrm/libdrm-apple.patch
+++ /dev/null
@@ -1,88 +0,0 @@
-diff -Naur libdrm-2.4.26-orig/intel/intel_bufmgr_gem.c libdrm-2.4.26/intel/intel_bufmgr_gem.c
---- libdrm-2.4.26-orig/intel/intel_bufmgr_gem.c	2011-04-01 10:30:51.000000000 -0400
-+++ libdrm-2.4.26/intel/intel_bufmgr_gem.c	2011-08-29 02:17:20.000000000 -0400
-@@ -51,6 +51,7 @@
- #include <sys/stat.h>
- #include <sys/types.h>
- #include <stdbool.h>
-+#include <sys/time.h>
- 
- #include "errno.h"
- #include "libdrm_lists.h"
-@@ -987,9 +988,9 @@
- 	if (atomic_dec_and_test(&bo_gem->refcount)) {
- 		drm_intel_bufmgr_gem *bufmgr_gem =
- 		    (drm_intel_bufmgr_gem *) bo->bufmgr;
--		struct timespec time;
-+		struct timeval time;
- 
--		clock_gettime(CLOCK_MONOTONIC, &time);
-+		gettimeofday(&time, NULL);
- 
- 		pthread_mutex_lock(&bufmgr_gem->lock);
- 		drm_intel_gem_bo_unreference_final(bo, time.tv_sec);
-diff -Naur libdrm-2.4.26-orig/xf86drm.c libdrm-2.4.26/xf86drm.c
---- libdrm-2.4.26-orig/xf86drm.c	2011-03-21 09:39:24.000000000 -0400
-+++ libdrm-2.4.26/xf86drm.c	2011-08-29 02:17:49.000000000 -0400
-@@ -51,6 +51,9 @@
- #include <sys/mman.h>
- #include <sys/time.h>
- #include <stdarg.h>
-+#if defined(__APPLE__) && defined(__MACH__)
-+#include <mach/mach_time.h>
-+#endif
- 
- /* Not all systems have MAP_FAILED defined */
- #ifndef MAP_FAILED
-@@ -1941,20 +1944,43 @@
-  */
- int drmWaitVBlank(int fd, drmVBlankPtr vbl)
- {
-+#if defined(__APPLE__) && defined(__MACH__)
-+    uint64_t start, end, elapsed, elapsedNano;
-+    static const uint64_t maxElapsed = 2000000000;
-+    static mach_timebase_info_data_t timebaseInfo;
-+    if ( timebaseInfo.denom == 0 ) {
-+	(void) mach_timebase_info(&timebaseInfo);
-+    }
-+#else
-     struct timespec timeout, cur;
-+#endif
-     int ret;
- 
-+#if defined(__APPLE__) && defined(__MACH__)
-+    start = mach_absolute_time();
-+#else
-     ret = clock_gettime(CLOCK_MONOTONIC, &timeout);
-     if (ret < 0) {
- 	fprintf(stderr, "clock_gettime failed: %s\n", strerror(ret));
- 	goto out;
-     }
-     timeout.tv_sec++;
-+#endif
- 
-     do {
-        ret = ioctl(fd, DRM_IOCTL_WAIT_VBLANK, vbl);
-        vbl->request.type &= ~DRM_VBLANK_RELATIVE;
-        if (ret && errno == EINTR) {
-+#if defined(__APPLE__) && defined(__MACH__)
-+	       end = mach_absolute_time();
-+	       elapsed = end - start;
-+	       elapsedNano = elapsed * timebaseInfo.numer / timebaseInfo.denom;
-+	       if (elapsedNano > maxElapsed) {
-+		   errno = EBUSY;
-+		   ret = -1;
-+		   break;
-+	       }
-+#else
- 	       clock_gettime(CLOCK_MONOTONIC, &cur);
- 	       /* Timeout after 1s */
- 	       if (cur.tv_sec > timeout.tv_sec + 1 ||
-@@ -1964,6 +1990,7 @@
- 		       ret = -1;
- 		       break;
- 	       }
-+#endif
-        }
-     } while (ret && errno == EINTR);
- 
diff --git a/pkgs/development/libraries/libsnark/darwin-fix-clock-gettime.patch b/pkgs/development/libraries/libsnark/darwin-fix-clock-gettime.patch
deleted file mode 100644
index 2eee84d1c4b8..000000000000
--- a/pkgs/development/libraries/libsnark/darwin-fix-clock-gettime.patch
+++ /dev/null
@@ -1,41 +0,0 @@
-Adapted from https://github.com/zcash/libsnark/pull/10
-
-diff --git a/depends/libff/libff/common/profiling.cpp b/depends/libff/libff/common/profiling.cpp
-index f2a1985..319149c 100755
---- a/depends/libff/libff/common/profiling.cpp
-+++ b/depends/libff/libff/common/profiling.cpp
-@@ -27,6 +27,13 @@
- #include <proc/readproc.h>
- #endif
- 
-+#ifdef __MACH__
-+#include <time.h>
-+#include <sys/time.h>
-+#include <mach/clock.h>
-+#include <mach/mach.h>
-+#endif
-+
- namespace libff {
- 
- long long get_nsec_time()
-@@ -42,10 +49,20 @@ long long get_nsec_cpu_time()
- 	return 0;
- #else
-     ::timespec ts;
-+#ifdef __MACH__
-+    clock_serv_t cclock;
-+    mach_timespec_t mts;
-+    host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
-+    clock_get_time(cclock, &mts);
-+    mach_port_deallocate(mach_task_self(), cclock);
-+    ts.tv_sec = mts.tv_sec;
-+    ts.tv_nsec = mts.tv_nsec;
-+#else
-     if ( ::clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts) )
-         throw ::std::runtime_error("clock_gettime(CLOCK_PROCESS_CPUTIME_ID) failed");
-         // If we expected this to work, don't silently ignore failures, because that would hide the problem and incur an unnecessarily system-call overhead. So if we ever observe this exception, we should probably add a suitable #ifdef .
-         //TODO: clock_gettime(CLOCK_PROCESS_CPUTIME_ID) is not supported by native Windows. What about Cygwin? Should we #ifdef on CLOCK_PROCESS_CPUTIME_ID or on __linux__?
-+#endif
-     return ts.tv_sec * 1000000000ll + ts.tv_nsec;
- #endif
- }
diff --git a/pkgs/development/libraries/libsnark/default.nix b/pkgs/development/libraries/libsnark/default.nix
index 4ea2209160f8..15d8169f1024 100644
--- a/pkgs/development/libraries/libsnark/default.nix
+++ b/pkgs/development/libraries/libsnark/default.nix
@@ -19,8 +19,6 @@ in stdenv.mkDerivation rec {
     fetchSubmodules = true;
   };
 
-  patches = [ ./darwin-fix-clock-gettime.patch ];
-
   enableParallelBuilding = true;
 
   meta = with stdenv.lib; {
diff --git a/pkgs/development/libraries/mesa/darwin-clock-gettime.patch b/pkgs/development/libraries/mesa/darwin-clock-gettime.patch
deleted file mode 100644
index 94e90a1c5871..000000000000
--- a/pkgs/development/libraries/mesa/darwin-clock-gettime.patch
+++ /dev/null
@@ -1,76 +0,0 @@
-diff --git a/include/c11/threads_posix.h b/include/c11/threads_posix.h
-index 45cb6075e6..62937311b9 100644
---- a/include/c11/threads_posix.h
-+++ b/include/c11/threads_posix.h
-@@ -36,6 +36,11 @@
- #include <sched.h>
- #include <stdint.h> /* for intptr_t */
- 
-+#ifdef __MACH__
-+#include <mach/clock.h>
-+#include <mach/mach.h>
-+#endif
-+
- /*
- Configuration macro:
- 
-@@ -383,12 +388,25 @@ tss_set(tss_t key, void *val)
- /*-------------------- 7.25.7 Time functions --------------------*/
- // 7.25.6.1
- #ifndef HAVE_TIMESPEC_GET
-+
- static inline int
- timespec_get(struct timespec *ts, int base)
- {
-     if (!ts) return 0;
-     if (base == TIME_UTC) {
-+#ifdef __MACH__
-+        if (ts != NULL) {
-+            clock_serv_t cclock;
-+            mach_timespec_t mts;
-+            host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
-+            clock_get_time(cclock, &mts);
-+            mach_port_deallocate(mach_task_self(), cclock);
-+            ts->tv_sec = mts.tv_sec;
-+            ts->tv_nsec = mts.tv_nsec;
-+        }
-+#else
-         clock_gettime(CLOCK_REALTIME, ts);
-+#endif
-         return base;
-     }
-     return 0;
-diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
-index 1208ebb315..e1378fb1f0 100644
---- a/src/egl/drivers/dri2/egl_dri2.c
-+++ b/src/egl/drivers/dri2/egl_dri2.c
-@@ -65,6 +65,11 @@
- #include "util/u_vector.h"
- #include "mapi/glapi/glapi.h"
- 
-+#ifdef __MACH__
-+#include <mach/clock.h>
-+#include <mach/mach.h>
-+#endif
-+
- #define NUM_ATTRIBS 12
- 
- static void
-@@ -3092,7 +3097,17 @@ dri2_client_wait_sync(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
- 
-             /* We override the clock to monotonic when creating the condition
-              * variable. */
-+#ifdef __MACH__
-+            clock_serv_t cclock;
-+            mach_timespec_t mts;
-+            host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
-+            clock_get_time(cclock, &mts);
-+            mach_port_deallocate(mach_task_self(), cclock);
-+            current.tv_sec = mts.tv_sec;
-+            current.tv_nsec = mts.tv_nsec;
-+#else
-             clock_gettime(CLOCK_MONOTONIC, &current);
-+#endif
- 
-             /* calculating when to expire */
-             expire.tv_nsec = timeout % 1000000000L;
diff --git a/pkgs/development/libraries/mesa/default.nix b/pkgs/development/libraries/mesa/default.nix
index 5bc1dfaf8783..c9ce97849e1a 100644
--- a/pkgs/development/libraries/mesa/default.nix
+++ b/pkgs/development/libraries/mesa/default.nix
@@ -93,7 +93,7 @@ let self = stdenv.mkDerivation {
     ./symlink-drivers.patch
     ./missing-includes.patch # dev_t needs sys/stat.h, time_t needs time.h, etc.-- fixes build w/musl
     ./disk_cache-include-dri-driver-path-in-cache-key.patch
-  ] ++ lib.optional stdenv.isDarwin ./darwin-clock-gettime.patch;
+  ];
 
   outputs = [ "out" "dev" "drivers" ]
             ++ lib.optional (elem "swrast" galliumDrivers) "osmesa";
diff --git a/pkgs/development/libraries/qt-5/5.11/default.nix b/pkgs/development/libraries/qt-5/5.11/default.nix
index 379c370e1fcc..0b6ba8c8746f 100644
--- a/pkgs/development/libraries/qt-5/5.11/default.nix
+++ b/pkgs/development/libraries/qt-5/5.11/default.nix
@@ -51,29 +51,17 @@ let
   patches = {
     qtbase = [
       ./qtbase.patch
-      ./qtbase-darwin.patch
-      ./qtbase-revert-no-macos10.10.patch
       ./qtbase-fixguicmake.patch
-    ] ++ optionals stdenv.isDarwin [
-      ./qtbase-darwin-nseventtype.patch
-      ./qtbase-darwin-revert-69221.patch
     ];
     qtdeclarative = [ ./qtdeclarative.patch ];
     qtscript = [ ./qtscript.patch ];
     qtserialport = [ ./qtserialport.patch ];
     qttools = [ ./qttools.patch ];
-    qtwebengine = [ ./qtwebengine-no-build-skip.patch ]
-      ++ optional stdenv.cc.isClang ./qtwebengine-clang-fix.patch
-      ++ optionals stdenv.isDarwin [
-        ./qtwebengine-darwin-no-platform-check.patch
-        ./qtwebengine-darwin-sdk-10.10.patch
-        ./qtwebengine-darwin-old-sdk.patch
-      ];
-    qtwebkit = [ ./qtwebkit.patch ]
-      ++ optionals stdenv.isDarwin [
-        ./qtwebkit-darwin-no-readline.patch
-        ./qtwebkit-darwin-no-qos-classes.patch
-      ];
+    qtwebengine = [
+      ./qtwebengine-no-build-skip.patch
+      ./qtwebengine-darwin-no-platform-check.patch
+    ];
+    qtwebkit = [ ./qtwebkit.patch ];
   };
 
   mkDerivation =
diff --git a/pkgs/development/libraries/qt-5/5.11/qtbase-darwin-nseventtype.patch b/pkgs/development/libraries/qt-5/5.11/qtbase-darwin-nseventtype.patch
deleted file mode 100644
index 9ef6e8ef0692..000000000000
--- a/pkgs/development/libraries/qt-5/5.11/qtbase-darwin-nseventtype.patch
+++ /dev/null
@@ -1,13 +0,0 @@
---- a/src/plugins/platforms/cocoa/qcocoawindow.mm
-+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
-@@ -404,8 +404,8 @@ void QCocoaWindow::setVisible(bool visible)
-                         removeMonitor();
-                         monitor = [NSEvent addGlobalMonitorForEventsMatchingMask:NSLeftMouseDownMask|NSRightMouseDownMask|NSOtherMouseDownMask|NSMouseMovedMask handler:^(NSEvent *e) {
-                             QPointF localPoint = QCocoaScreen::mapFromNative([NSEvent mouseLocation]);
--                            const auto button = e.type == NSEventTypeMouseMoved ? Qt::NoButton : cocoaButton2QtButton([e buttonNumber]);
--                            const auto eventType = e.type == NSEventTypeMouseMoved ? QEvent::MouseMove : QEvent::MouseButtonPress;
-+                            const auto button = e.type == NSMouseMoved ? Qt::NoButton : cocoaButton2QtButton([e buttonNumber]);
-+                            const auto eventType = e.type == NSMouseMoved ? QEvent::MouseMove : QEvent::MouseButtonPress;
-                             QWindowSystemInterface::handleMouseEvent(window(), window()->mapFromGlobal(localPoint.toPoint()), localPoint,
-                                                                      Qt::MouseButtons(uint(NSEvent.pressedMouseButtons & 0xFFFF)), button, eventType);
-                         }];
diff --git a/pkgs/development/libraries/qt-5/5.11/qtbase-darwin-revert-69221.patch b/pkgs/development/libraries/qt-5/5.11/qtbase-darwin-revert-69221.patch
deleted file mode 100644
index 73eea435f847..000000000000
--- a/pkgs/development/libraries/qt-5/5.11/qtbase-darwin-revert-69221.patch
+++ /dev/null
@@ -1,73 +0,0 @@
-diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
-index 00c3f7c22c..94d35f59d6 100644
---- a/src/plugins/platforms/cocoa/qcocoawindow.mm
-+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
-@@ -1355,15 +1355,6 @@ QCocoaNSWindow *QCocoaWindow::createNSWindow(bool shouldBePanel)
- {
-     QMacAutoReleasePool pool;
- 
--    Qt::WindowType type = window()->type();
--    Qt::WindowFlags flags = window()->flags();
--
--    // Note: The macOS window manager has a bug, where if a screen is rotated, it will not allow
--    // a window to be created within the area of the screen that has a Y coordinate (I quadrant)
--    // higher than the height of the screen  in its non-rotated state, unless the window is
--    // created with the NSWindowStyleMaskBorderless style mask.
--    NSWindowStyleMask styleMask = windowStyleMask(flags);
--
-     QRect rect = geometry();
- 
-     QScreen *targetScreen = nullptr;
-@@ -1375,22 +1366,26 @@ QCocoaNSWindow *QCocoaWindow::createNSWindow(bool shouldBePanel)
-     }
- 
-     if (!targetScreen) {
--        qCWarning(lcQpaCocoaWindow) << "Window position" << rect << "outside any known screen, using primary screen";
-+        qCWarning(lcQpaCocoaWindow) << "Window position outside any known screen, using primary screen";
-         targetScreen = QGuiApplication::primaryScreen();
--        // AppKit will only reposition a window that's outside the target screen area if
--        // the window has a title bar. If left out, the window ends up with no screen.
--        // The style mask will be corrected to the original style mask in setWindowFlags.
--        styleMask |= NSWindowStyleMaskTitled;
-     }
- 
-     rect.translate(-targetScreen->geometry().topLeft());
-     QCocoaScreen *cocoaScreen = static_cast<QCocoaScreen *>(targetScreen->handle());
-     NSRect frame = QCocoaScreen::mapToNative(rect, cocoaScreen);
- 
-+    // Note: The macOS window manager has a bug, where if a screen is rotated, it will not allow
-+    // a window to be created within the area of the screen that has a Y coordinate (I quadrant)
-+    // higher than the height of the screen  in its non-rotated state, unless the window is
-+    // created with the NSWindowStyleMaskBorderless style mask.
-+
-+    Qt::WindowType type = window()->type();
-+    Qt::WindowFlags flags = window()->flags();
-+
-     // Create NSWindow
-     Class windowClass = shouldBePanel ? [QNSPanel class] : [QNSWindow class];
-     QCocoaNSWindow *nsWindow = [[windowClass alloc] initWithContentRect:frame
--        styleMask:styleMask
-+        styleMask:windowStyleMask(flags)
-         // Deferring window creation breaks OpenGL (the GL context is
-         // set up before the window is shown and needs a proper window)
-         backing:NSBackingStoreBuffered defer:NO
-@@ -1399,9 +1394,6 @@ QCocoaNSWindow *QCocoaWindow::createNSWindow(bool shouldBePanel)
-     Q_ASSERT_X(nsWindow.screen == cocoaScreen->nativeScreen(), "QCocoaWindow",
-         "Resulting NSScreen should match the requested NSScreen");
- 
--    if (targetScreen != window()->screen())
--        QWindowSystemInterface::handleWindowScreenChanged(window(), targetScreen);
--
-     nsWindow.delegate = [[QNSWindowDelegate alloc] initWithQCocoaWindow:this];
- 
-     // Prevent Cocoa from releasing the window on close. Qt
-@@ -1421,6 +1413,9 @@ QCocoaNSWindow *QCocoaWindow::createNSWindow(bool shouldBePanel)
-         });
-     }
- 
-+    if (targetScreen != window()->screen())
-+        QWindowSystemInterface::handleWindowScreenChanged(window(), targetScreen);
-+
-     nsWindow.restorable = NO;
-     nsWindow.level = windowLevel(flags);
- 
diff --git a/pkgs/development/libraries/qt-5/5.11/qtbase-darwin.patch b/pkgs/development/libraries/qt-5/5.11/qtbase-darwin.patch
deleted file mode 100644
index f66351752054..000000000000
--- a/pkgs/development/libraries/qt-5/5.11/qtbase-darwin.patch
+++ /dev/null
@@ -1,70 +0,0 @@
-diff --git a/src/plugins/bearer/corewlan/qcorewlanengine.mm b/src/plugins/bearer/corewlan/qcorewlanengine.mm
-index 341d3bccf2..3368234c26 100644
---- a/src/plugins/bearer/corewlan/qcorewlanengine.mm
-+++ b/src/plugins/bearer/corewlan/qcorewlanengine.mm
-@@ -287,7 +287,7 @@ void QScanThread::getUserConfigurations()
-     QMacAutoReleasePool pool;
-     userProfiles.clear();
- 
--    NSArray<NSString *> *wifiInterfaces = [CWWiFiClient interfaceNames];
-+    NSArray *wifiInterfaces = [CWWiFiClient interfaceNames];
-     for (NSString *ifName in wifiInterfaces) {
- 
-         CWInterface *wifiInterface = [[CWWiFiClient sharedWiFiClient] interfaceWithName:ifName];
-@@ -602,7 +602,7 @@ void QCoreWlanEngine::doRequestUpdate()
- 
-     QMacAutoReleasePool pool;
- 
--    NSArray<NSString *> *wifiInterfaces = [CWWiFiClient interfaceNames];
-+    NSArray *wifiInterfaces = [CWWiFiClient interfaceNames];
-     for (NSString *ifName in wifiInterfaces) {
-             scanThread->interfaceName = QString::fromNSString(ifName);
-             scanThread->start();
-diff --git a/src/plugins/platforms/cocoa/qcocoascreen.mm b/src/plugins/platforms/cocoa/qcocoascreen.mm
-index a17a02b629..d76c42fa03 100644
---- a/src/plugins/platforms/cocoa/qcocoascreen.mm
-+++ b/src/plugins/platforms/cocoa/qcocoascreen.mm
-@@ -114,7 +114,7 @@ void QCocoaScreen::updateGeometry()
-         return;
-
-     // The reference screen for the geometry is always the primary screen
--    QRectF primaryScreenGeometry = QRectF::fromCGRect([[NSScreen screens] firstObject].frame);
-+    QRectF primaryScreenGeometry = QRectF::fromCGRect([[[NSScreen screens] firstObject] frame]);
-     m_geometry = qt_mac_flip(QRectF::fromCGRect(nsScreen.frame), primaryScreenGeometry).toRect();
-     m_availableGeometry = qt_mac_flip(QRectF::fromCGRect(nsScreen.visibleFrame), primaryScreenGeometry).toRect();
-
-diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
-index 72f3bc0075..a9c058a850 100644
---- a/src/plugins/platforms/cocoa/qcocoawindow.mm
-+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
-@@ -1676,7 +1676,7 @@ void QCocoaWindow::applyContentBorderThickness(NSWindow *window)
- 
-     if (!m_drawContentBorderGradient) {
-         window.styleMask = window.styleMask & ~NSTexturedBackgroundWindowMask;
--        [window.contentView.superview setNeedsDisplay:YES];
-+        [[window.contentView superview] setNeedsDisplay:YES];
-         window.titlebarAppearsTransparent = NO;
-         return;
-     }
-diff --git a/src/plugins/platforms/cocoa/qnswindow.mm b/src/plugins/platforms/cocoa/qnswindow.mm
-index cb13b7d184..0159d68dca 100644
---- a/src/plugins/platforms/cocoa/qnswindow.mm
-+++ b/src/plugins/platforms/cocoa/qnswindow.mm
-@@ -231,7 +231,7 @@ static bool isMouseEvent(NSEvent *ev)
-     if (pw->frameStrutEventsEnabled() && isMouseEvent(theEvent)) {
-         NSPoint loc = [theEvent locationInWindow];
-         NSRect windowFrame = [self convertRectFromScreen:self.frame];
--        NSRect contentFrame = self.contentView.frame;
-+        NSRect contentFrame = [self.contentView frame];
-         if (NSMouseInRect(loc, windowFrame, NO) && !NSMouseInRect(loc, contentFrame, NO))
-             [qnsview_cast(pw->view()) handleFrameStrutMouseEvent:theEvent];
-     }
-@@ -260,7 +260,7 @@ static bool isMouseEvent(NSEvent *ev)
- + (void)applicationActivationChanged:(NSNotification*)notification
- {
-     const id sender = self;
--    NSEnumerator<NSWindow*> *windowEnumerator = nullptr;
-+    NSEnumerator *windowEnumerator = nullptr;
-     NSApplication *application = [NSApplication sharedApplication];
- 
- #if QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_12)
diff --git a/pkgs/development/libraries/qt-5/5.11/qtbase-revert-no-macos10.10.patch b/pkgs/development/libraries/qt-5/5.11/qtbase-revert-no-macos10.10.patch
deleted file mode 100644
index 29776518379d..000000000000
--- a/pkgs/development/libraries/qt-5/5.11/qtbase-revert-no-macos10.10.patch
+++ /dev/null
@@ -1,102 +0,0 @@
-Revert "Remove code paths for macOS < 10.11"
-
-This reverts commit 138a65e0cfa80b13fd018a01e7d8b33341a3cfd3.
-
-From 138a65e0cfa80b13fd018a01e7d8b33341a3cfd3 Mon Sep 17 00:00:00 2001
-From: Jake Petroules <jake.petroules@qt.io>
-Date: Thu, 8 Feb 2018 11:05:42 -0800
-Subject: [PATCH] Remove code paths for macOS < 10.11
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Change-Id: I5ae02d88aa3dcd97d1f2ebf6255a68643e5d6daa
-Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
-Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>
-Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
----
- .../fontdatabases/mac/qfontengine_coretext.mm            | 16 +++-------------
- src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm    |  6 +-----
- src/plugins/platforms/cocoa/qnswindowdelegate.mm         | 16 ----------------
- 3 files changed, 4 insertions(+), 34 deletions(-)
-
-diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
-index 98b753eff9..489d9cd031 100644
---- a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
-+++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
-@@ -47,18 +47,28 @@
- 
- #include <cmath>
- 
--#if defined(Q_OS_MACOS)
-+#if defined(Q_OS_OSX) && !QT_OSX_DEPLOYMENT_TARGET_BELOW(__MAC_10_11)
- #import <AppKit/AppKit.h>
- #endif
- 
--#if defined(QT_PLATFORM_UIKIT)
-+#if defined(QT_PLATFORM_UIKIT) && !QT_IOS_DEPLOYMENT_TARGET_BELOW(__IPHONE_8_2)
- #import <UIKit/UIKit.h>
- #endif
- 
- // These are available cross platform, exported as kCTFontWeightXXX from CoreText.framework,
- // but they are not documented and are not in public headers so are private API and exposed
- // only through the NSFontWeightXXX and UIFontWeightXXX aliases in AppKit and UIKit (rdar://26109857)
--#if defined(Q_OS_MACOS)
-+#if QT_MAC_DEPLOYMENT_TARGET_BELOW(__MAC_10_11, __IPHONE_8_2)
-+#define kCTFontWeightUltraLight -0.8
-+#define kCTFontWeightThin -0.6
-+#define kCTFontWeightLight -0.4
-+#define kCTFontWeightRegular 0
-+#define kCTFontWeightMedium 0.23
-+#define kCTFontWeightSemibold 0.3
-+#define kCTFontWeightBold 0.4
-+#define kCTFontWeightHeavy 0.56
-+#define kCTFontWeightBlack 0.62
-+#elif defined(Q_OS_OSX)
- #define kCTFontWeightUltraLight NSFontWeightUltraLight
- #define kCTFontWeightThin NSFontWeightThin
- #define kCTFontWeightLight NSFontWeightLight
-diff --git a/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm b/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm
-index 94f2125bad..272cd9f3dc 100644
---- a/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm
-+++ b/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm
-@@ -162,7 +162,11 @@ QT_NAMESPACE_ALIAS_OBJC_CLASS(QNSOpenSavePanelDelegate);
-     // resetting our mCurrentDir, set the delegate
-     // here to make sure it gets the correct value.
-     [mSavePanel setDelegate:self];
--    mOpenPanel.accessoryViewDisclosed = YES;
-+
-+#if QT_OSX_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_11)
-+    if (__builtin_available(macOS 10.11, *))
-+        mOpenPanel.accessoryViewDisclosed = YES;
-+#endif
- 
-     if (mOptions->isLabelExplicitlySet(QFileDialogOptions::Accept))
-         [mSavePanel setPrompt:[self strip:options->labelText(QFileDialogOptions::Accept)]];
-diff --git a/src/plugins/platforms/cocoa/qnswindowdelegate.mm b/src/plugins/platforms/cocoa/qnswindowdelegate.mm
-index 057a4c2943..eb55e50622 100644
---- a/src/plugins/platforms/cocoa/qnswindowdelegate.mm
-+++ b/src/plugins/platforms/cocoa/qnswindowdelegate.mm
-@@ -103,6 +103,22 @@ static QRegExp whitespaceRegex = QRegExp(QStringLiteral("\\s*"));
-     return QCocoaScreen::mapToNative(maximizedFrame);
- }
- 
-+#if QT_MACOS_DEPLOYMENT_TARGET_BELOW(__MAC_10_11)
-+/*
-+    AppKit on OS X 10.10 wrongly calls windowWillUseStandardFrame:defaultFrame
-+    from -[NSWindow _frameForFullScreenMode] when going into fullscreen, resulting
-+    in black bars on top and bottom of the window. By implementing the following
-+    method, AppKit will choose that instead, and resolve the right fullscreen
-+    geometry.
-+*/
-+- (NSSize)window:(NSWindow *)window willUseFullScreenContentSize:(NSSize)proposedSize
-+{
-+    Q_UNUSED(proposedSize);
-+    Q_ASSERT(window == m_cocoaWindow->nativeWindow());
-+    return NSSizeFromCGSize(m_cocoaWindow->screen()->geometry().size().toCGSize());
-+}
-+#endif
-+
- - (BOOL)window:(NSWindow *)window shouldPopUpDocumentPathMenu:(NSMenu *)menu
- {
-     Q_UNUSED(window);
diff --git a/pkgs/development/libraries/qt-5/5.11/qtwebengine-clang-fix.patch b/pkgs/development/libraries/qt-5/5.11/qtwebengine-clang-fix.patch
deleted file mode 100644
index 8dafd65cd343..000000000000
--- a/pkgs/development/libraries/qt-5/5.11/qtwebengine-clang-fix.patch
+++ /dev/null
@@ -1,30 +0,0 @@
-Fix a following build error:
-
-In file included from ../../3rdparty/chromium/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.mm:7:
-../../3rdparty/chromium/base/bind.h:59:3: error: static_assert failed "Bound argument |i| of type |Arg| cannot be forwarded as |Unwrapped| to the bound functor, which declares it as |Param|."
-  static_assert(
-  ^
-../../3rdparty/chromium/base/bind.h:91:7: note: in instantiation of template class 'base::internal::AssertConstructible<1, long, long, const long &, NSError *>' requested here
-    : AssertConstructible<Ns, Args, std::decay_t<Args>, Unwrapped, Params>... {
-      ^
-../../3rdparty/chromium/base/bind.h:213:27: note: in instantiation of template class 'base::internal::AssertBindArgsValidity<std::__1::integer_sequence<unsigned long, 0, 1>, base::internal::TypeList<base::WeakPtr<device::BluetoothRemoteGattCharacteristicMac>, long>, base::internal::TypeList<device::BluetoothRemoteGattCharacteristicMac *, const long &>, base::internal::TypeList<device::BluetoothRemoteGattCharacteristicMac *, NSError *> >' requested here
-  static_assert(internal::AssertBindArgsValidity<
-                          ^
-../../3rdparty/chromium/base/bind.h:242:16: note: in instantiation of function template specialization 'base::BindRepeating<void (device::BluetoothRemoteGattCharacteristicMac::*)(NSError *), base::WeakPtr<device::BluetoothRemoteGattCharacteristicMac>, long>' requested here
-  return base::BindRepeating(std::forward<Functor>(functor),
-               ^
-../../3rdparty/chromium/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.mm:211:15: note: in instantiation of function template specialization 'base::Bind<void (device::BluetoothRemoteGattCharacteristicMac::*)(NSError *), base::WeakPtr<device::BluetoothRemoteGattCharacteristicMac>, long>' requested here
-        base::Bind(&BluetoothRemoteGattCharacteristicMac::DidWriteValue,
-              ^
-
---- a/src/3rdparty/chromium/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.mm
-+++ b/src/3rdparty/chromium/device/bluetooth/bluetooth_remote_gatt_characteristic_mac.mm
-@@ -209,7 +209,7 @@ void BluetoothRemoteGattCharacteristicMac::WriteRemoteCharacteristic(
-     base::ThreadTaskRunnerHandle::Get()->PostTask(
-         FROM_HERE,
-         base::Bind(&BluetoothRemoteGattCharacteristicMac::DidWriteValue,
--                   weak_ptr_factory_.GetWeakPtr(), nil));
-+                   weak_ptr_factory_.GetWeakPtr(), nullptr));
-   }
- }
- 
diff --git a/pkgs/development/libraries/qt-5/5.11/qtwebengine-darwin-old-sdk.patch b/pkgs/development/libraries/qt-5/5.11/qtwebengine-darwin-old-sdk.patch
deleted file mode 100644
index b065c2211017..000000000000
--- a/pkgs/development/libraries/qt-5/5.11/qtwebengine-darwin-old-sdk.patch
+++ /dev/null
@@ -1,21 +0,0 @@
-diff --git a/src/3rdparty/chromium/third_party/webrtc/sdk/objc/Framework/Classes/Common/RTCFieldTrials.mm b/src/3rdparty/chromium/third_party/webrtc/sdk/objc/Framework/Classes/Common/RTCFieldTrials.mm
---- a/src/3rdparty/chromium/third_party/webrtc/sdk/objc/Framework/Classes/Common/RTCFieldTrials.mm
-+++ b/src/3rdparty/chromium/third_party/webrtc/sdk/objc/Framework/Classes/Common/RTCFieldTrials.mm
-@@ -45,7 +45,7 @@ NSString *RTCFieldTrialTrendlineFilterValue(
-   return [NSString stringWithFormat:format, windowSize, smoothingCoeff, thresholdGain];
- }
- 
--void RTCInitFieldTrialDictionary(NSDictionary<NSString *, NSString *> *fieldTrials) {
-+void RTCInitFieldTrialDictionary(NSDictionary *fieldTrials) {
-   if (!fieldTrials) {
-     RTCLogWarning(@"No fieldTrials provided.");
-     return;
-diff --git a/src/3rdparty/chromium/third_party/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h b/src/3rdparty/chromium/third_party/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
---- a/src/3rdparty/chromium/third_party/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
-+++ b/src/3rdparty/chromium/third_party/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
-@@ -40,4 +40,4 @@ RTC_EXTERN NSString *RTCFieldTrialTrendlineFilterValue(
-  *  Must be called before any other call into WebRTC. See:
-  *  webrtc/system_wrappers/include/field_trial_default.h
-  */
--RTC_EXTERN void RTCInitFieldTrialDictionary(NSDictionary<NSString *, NSString *> *fieldTrials);
-+RTC_EXTERN void RTCInitFieldTrialDictionary(NSDictionary *fieldTrials);
diff --git a/pkgs/development/libraries/qt-5/5.11/qtwebengine-darwin-sdk-10.10.patch b/pkgs/development/libraries/qt-5/5.11/qtwebengine-darwin-sdk-10.10.patch
deleted file mode 100644
index d43b09b95383..000000000000
--- a/pkgs/development/libraries/qt-5/5.11/qtwebengine-darwin-sdk-10.10.patch
+++ /dev/null
@@ -1,160 +0,0 @@
-Fix build against 10.10 SDK
-
-The SecKey part perhaps could be fixed by implementing a revert to
-https://chromium.googlesource.com/chromium/src.git/+/8418e098b9cbedf884878b61dcd3292c515845cf%5E%21/#F0
-
---- a/src/3rdparty/chromium/content/browser/renderer_host/input/web_input_event_builders_mac.mm
-+++ b/src/3rdparty/chromium/content/browser/renderer_host/input/web_input_event_builders_mac.mm
-@@ -1,3 +1,4 @@
-+#define NSEventTypeScrollWheel 22
- // Copyright 2015 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
---- a/src/3rdparty/chromium/net/ssl/ssl_platform_key_mac.cc
-+++ b/src/3rdparty/chromium/net/ssl/ssl_platform_key_mac.cc
-@@ -48,21 +48,6 @@ namespace net {
- 
- namespace {
- 
--// TODO(davidben): Remove this when we switch to building to the 10.13
--// SDK. https://crbug.com/780980
--#if !defined(MAC_OS_X_VERSION_10_13) || \
--    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_13
--API_AVAILABLE(macosx(10.13))
--const SecKeyAlgorithm kSecKeyAlgorithmRSASignatureDigestPSSSHA256 =
--    CFSTR("algid:sign:RSA:digest-PSS:SHA256:SHA256:32");
--API_AVAILABLE(macosx(10.13))
--const SecKeyAlgorithm kSecKeyAlgorithmRSASignatureDigestPSSSHA384 =
--    CFSTR("algid:sign:RSA:digest-PSS:SHA384:SHA384:48");
--API_AVAILABLE(macosx(10.13))
--const SecKeyAlgorithm kSecKeyAlgorithmRSASignatureDigestPSSSHA512 =
--    CFSTR("algid:sign:RSA:digest-PSS:SHA512:SHA512:64");
--#endif
--
- class ScopedCSSM_CC_HANDLE {
-  public:
-   ScopedCSSM_CC_HANDLE() : handle_(0) {}
-@@ -187,109 +172,6 @@ class SSLPlatformKeyCSSM : public ThreadedSSLPrivateKey::Delegate {
-   DISALLOW_COPY_AND_ASSIGN(SSLPlatformKeyCSSM);
- };
- 
--// Returns the corresponding SecKeyAlgorithm or nullptr if unrecognized.
--API_AVAILABLE(macosx(10.12))
--SecKeyAlgorithm GetSecKeyAlgorithm(uint16_t algorithm) {
--  switch (algorithm) {
--    case SSL_SIGN_RSA_PKCS1_SHA512:
--      return kSecKeyAlgorithmRSASignatureDigestPKCS1v15SHA512;
--    case SSL_SIGN_RSA_PKCS1_SHA384:
--      return kSecKeyAlgorithmRSASignatureDigestPKCS1v15SHA384;
--    case SSL_SIGN_RSA_PKCS1_SHA256:
--      return kSecKeyAlgorithmRSASignatureDigestPKCS1v15SHA256;
--    case SSL_SIGN_RSA_PKCS1_SHA1:
--      return kSecKeyAlgorithmRSASignatureDigestPKCS1v15SHA1;
--    case SSL_SIGN_RSA_PKCS1_MD5_SHA1:
--      return kSecKeyAlgorithmRSASignatureDigestPKCS1v15Raw;
--    case SSL_SIGN_ECDSA_SECP521R1_SHA512:
--      return kSecKeyAlgorithmECDSASignatureDigestX962SHA512;
--    case SSL_SIGN_ECDSA_SECP384R1_SHA384:
--      return kSecKeyAlgorithmECDSASignatureDigestX962SHA384;
--    case SSL_SIGN_ECDSA_SECP256R1_SHA256:
--      return kSecKeyAlgorithmECDSASignatureDigestX962SHA256;
--    case SSL_SIGN_ECDSA_SHA1:
--      return kSecKeyAlgorithmECDSASignatureDigestX962SHA1;
--  }
--
--  if (base::mac::IsAtLeastOS10_13()) {
--    switch (algorithm) {
--      case SSL_SIGN_RSA_PSS_SHA512:
--        return kSecKeyAlgorithmRSASignatureDigestPSSSHA512;
--      case SSL_SIGN_RSA_PSS_SHA384:
--        return kSecKeyAlgorithmRSASignatureDigestPSSSHA384;
--      case SSL_SIGN_RSA_PSS_SHA256:
--        return kSecKeyAlgorithmRSASignatureDigestPSSSHA256;
--    }
--  }
--
--  return nullptr;
--}
--
--class API_AVAILABLE(macosx(10.12)) SSLPlatformKeySecKey
--    : public ThreadedSSLPrivateKey::Delegate {
-- public:
--  SSLPlatformKeySecKey(int type, size_t max_length, SecKeyRef key)
--      : key_(key, base::scoped_policy::RETAIN) {
--    // Determine the algorithms supported by the key.
--    for (uint16_t algorithm : SSLPrivateKey::DefaultAlgorithmPreferences(
--             type, true /* include PSS */)) {
--      SecKeyAlgorithm sec_algorithm = GetSecKeyAlgorithm(algorithm);
--      if (sec_algorithm &&
--          SecKeyIsAlgorithmSupported(key_.get(), kSecKeyOperationTypeSign,
--                                     sec_algorithm)) {
--        preferences_.push_back(algorithm);
--      }
--    }
--  }
--
--  ~SSLPlatformKeySecKey() override {}
--
--  std::vector<uint16_t> GetAlgorithmPreferences() override {
--    return preferences_;
--  }
--
--  Error Sign(uint16_t algorithm,
--             base::span<const uint8_t> input,
--             std::vector<uint8_t>* signature) override {
--    SecKeyAlgorithm sec_algorithm = GetSecKeyAlgorithm(algorithm);
--    if (!sec_algorithm) {
--      NOTREACHED();
--      return ERR_FAILED;
--    }
--
--    const EVP_MD* md = SSL_get_signature_algorithm_digest(algorithm);
--    uint8_t digest[EVP_MAX_MD_SIZE];
--    unsigned digest_len;
--    if (!md || !EVP_Digest(input.data(), input.size(), digest, &digest_len, md,
--                           nullptr)) {
--      return ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED;
--    }
--
--    base::ScopedCFTypeRef<CFDataRef> digest_ref(CFDataCreateWithBytesNoCopy(
--        kCFAllocatorDefault, digest, base::checked_cast<CFIndex>(digest_len),
--        kCFAllocatorNull));
--
--    base::ScopedCFTypeRef<CFErrorRef> error;
--    base::ScopedCFTypeRef<CFDataRef> signature_ref(SecKeyCreateSignature(
--        key_, sec_algorithm, digest_ref, error.InitializeInto()));
--    if (!signature_ref) {
--      LOG(ERROR) << error;
--      return ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED;
--    }
--
--    signature->assign(
--        CFDataGetBytePtr(signature_ref),
--        CFDataGetBytePtr(signature_ref) + CFDataGetLength(signature_ref));
--    return OK;
--  }
--
-- private:
--  std::vector<uint16_t> preferences_;
--  base::ScopedCFTypeRef<SecKeyRef> key_;
--
--  DISALLOW_COPY_AND_ASSIGN(SSLPlatformKeySecKey);
--};
--
- scoped_refptr<SSLPrivateKey> CreateSSLPrivateKeyForSecKey(
-     const X509Certificate* certificate,
-     SecKeyRef private_key) {
-@@ -298,13 +180,6 @@ scoped_refptr<SSLPrivateKey> CreateSSLPrivateKeyForSecKey(
-   if (!GetClientCertInfo(certificate, &key_type, &max_length))
-     return nullptr;
- 
--  if (base::mac::IsAtLeastOS10_12()) {
--    return base::MakeRefCounted<ThreadedSSLPrivateKey>(
--        std::make_unique<SSLPlatformKeySecKey>(key_type, max_length,
--                                               private_key),
--        GetSSLPlatformKeyTaskRunner());
--  }
--
-   const CSSM_KEY* cssm_key;
-   OSStatus status = SecKeyGetCSSMKey(private_key, &cssm_key);
-   if (status != noErr) {
diff --git a/pkgs/development/libraries/qt-5/5.11/qtwebkit-darwin-no-qos-classes.patch b/pkgs/development/libraries/qt-5/5.11/qtwebkit-darwin-no-qos-classes.patch
deleted file mode 100644
index a7087f517623..000000000000
--- a/pkgs/development/libraries/qt-5/5.11/qtwebkit-darwin-no-qos-classes.patch
+++ /dev/null
@@ -1,11 +0,0 @@
-diff --git a/Source/cmake/OptionsQt.cmake b/Source/cmake/OptionsQt.cmake
---- a/Source/cmake/OptionsQt.cmake
-+++ b/Source/cmake/OptionsQt.cmake
-@@ -683,7 +683,6 @@ if (WIN32 AND COMPILER_IS_GCC_OR_CLANG)
- endif ()
- 
- if (APPLE)
--    SET_AND_EXPOSE_TO_BUILD(HAVE_QOS_CLASSES 1)
- endif ()
- 
- if (ENABLE_MATHML)
diff --git a/pkgs/development/libraries/qt-5/5.11/qtwebkit-darwin-no-readline.patch b/pkgs/development/libraries/qt-5/5.11/qtwebkit-darwin-no-readline.patch
deleted file mode 100644
index 26d189d86019..000000000000
--- a/pkgs/development/libraries/qt-5/5.11/qtwebkit-darwin-no-readline.patch
+++ /dev/null
@@ -1,45 +0,0 @@
-diff --git a/Source/JavaScriptCore/shell/CMakeLists.txt b/Source/JavaScriptCore/shell/CMakeLists.txt
---- a/Source/JavaScriptCore/shell/CMakeLists.txt
-+++ b/Source/JavaScriptCore/shell/CMakeLists.txt
-@@ -9,7 +9,6 @@ set(JSC_LIBRARIES
- )
- 
- if (WTF_OS_MAC_OS_X)
--    list(APPEND JSC_LIBRARIES edit)
- endif ()
- 
- if ("${JavaScriptCore_LIBRARY_TYPE}" MATCHES "STATIC")
-diff --git a/Source/WTF/wtf/Platform.h b/Source/WTF/wtf/Platform.h
---- a/Source/WTF/wtf/Platform.h
-+++ b/Source/WTF/wtf/Platform.h
-@@ -563,7 +563,6 @@
- #if PLATFORM(IOS)
- 
- #define HAVE_NETWORK_EXTENSION 1
--#define HAVE_READLINE 1
- #if USE(APPLE_INTERNAL_SDK)
- #define USE_CFNETWORK 1
- #endif
-@@ -650,7 +649,6 @@
- #define HAVE_MADV_DONTNEED 1
- #define HAVE_MERGESORT 1
- #define HAVE_PTHREAD_SETNAME_NP 1
--#define HAVE_READLINE 1
- #define HAVE_SYS_TIMEB_H 1
- 
- #if !PLATFORM(GTK) && !PLATFORM(QT)
-diff --git a/Source/WTF/wtf/PlatformMac.cmake b/Source/WTF/wtf/PlatformMac.cmake
---- a/Source/WTF/wtf/PlatformMac.cmake
-+++ b/Source/WTF/wtf/PlatformMac.cmake
-@@ -2,11 +2,9 @@ set(WTF_LIBRARY_TYPE SHARED)
- 
- find_library(COCOA_LIBRARY Cocoa)
- find_library(COREFOUNDATION_LIBRARY CoreFoundation)
--find_library(READLINE_LIBRARY Readline)
- list(APPEND WTF_LIBRARIES
-     ${COREFOUNDATION_LIBRARY}
-     ${COCOA_LIBRARY}
--    ${READLINE_LIBRARY}
-     libicucore.dylib
- )
- 
diff --git a/pkgs/development/libraries/qt-5/5.12/default.nix b/pkgs/development/libraries/qt-5/5.12/default.nix
index 6d0e241d7a54..b3095dd9a7e3 100644
--- a/pkgs/development/libraries/qt-5/5.12/default.nix
+++ b/pkgs/development/libraries/qt-5/5.12/default.nix
@@ -51,11 +51,7 @@ let
   patches = {
     qtbase = [
       ./qtbase.patch
-      ./qtbase-darwin.patch
-      ./qtbase-revert-no-macos10.10.patch
       ./qtbase-fixguicmake.patch
-    ] ++ optionals stdenv.isDarwin [
-      ./qtbase-darwin-nseventtype.patch
     ];
     qtdeclarative = [ ./qtdeclarative.patch ];
     qtscript = [ ./qtscript.patch ];
diff --git a/pkgs/development/libraries/qt-5/5.12/qtbase-darwin-nseventtype.patch b/pkgs/development/libraries/qt-5/5.12/qtbase-darwin-nseventtype.patch
deleted file mode 100644
index 9ef6e8ef0692..000000000000
--- a/pkgs/development/libraries/qt-5/5.12/qtbase-darwin-nseventtype.patch
+++ /dev/null
@@ -1,13 +0,0 @@
---- a/src/plugins/platforms/cocoa/qcocoawindow.mm
-+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
-@@ -404,8 +404,8 @@ void QCocoaWindow::setVisible(bool visible)
-                         removeMonitor();
-                         monitor = [NSEvent addGlobalMonitorForEventsMatchingMask:NSLeftMouseDownMask|NSRightMouseDownMask|NSOtherMouseDownMask|NSMouseMovedMask handler:^(NSEvent *e) {
-                             QPointF localPoint = QCocoaScreen::mapFromNative([NSEvent mouseLocation]);
--                            const auto button = e.type == NSEventTypeMouseMoved ? Qt::NoButton : cocoaButton2QtButton([e buttonNumber]);
--                            const auto eventType = e.type == NSEventTypeMouseMoved ? QEvent::MouseMove : QEvent::MouseButtonPress;
-+                            const auto button = e.type == NSMouseMoved ? Qt::NoButton : cocoaButton2QtButton([e buttonNumber]);
-+                            const auto eventType = e.type == NSMouseMoved ? QEvent::MouseMove : QEvent::MouseButtonPress;
-                             QWindowSystemInterface::handleMouseEvent(window(), window()->mapFromGlobal(localPoint.toPoint()), localPoint,
-                                                                      Qt::MouseButtons(uint(NSEvent.pressedMouseButtons & 0xFFFF)), button, eventType);
-                         }];
diff --git a/pkgs/development/libraries/qt-5/5.12/qtbase-darwin.patch b/pkgs/development/libraries/qt-5/5.12/qtbase-darwin.patch
deleted file mode 100644
index 7ce27a99758e..000000000000
--- a/pkgs/development/libraries/qt-5/5.12/qtbase-darwin.patch
+++ /dev/null
@@ -1,70 +0,0 @@
-diff --git a/src/plugins/bearer/corewlan/qcorewlanengine.mm b/src/plugins/bearer/corewlan/qcorewlanengine.mm
-index c3dd49ff3e..6871399817 100644
---- a/src/plugins/bearer/corewlan/qcorewlanengine.mm
-+++ b/src/plugins/bearer/corewlan/qcorewlanengine.mm
-@@ -283,7 +283,7 @@ void QScanThread::getUserConfigurations()
-     QMacAutoReleasePool pool;
-     userProfiles.clear();
- 
--    NSArray<NSString *> *wifiInterfaces = [CWWiFiClient interfaceNames];
-+    NSArray *wifiInterfaces = [CWWiFiClient interfaceNames];
-     for (NSString *ifName in wifiInterfaces) {
- 
-         CWInterface *wifiInterface = [[CWWiFiClient sharedWiFiClient] interfaceWithName:ifName];
-@@ -598,7 +598,7 @@ void QCoreWlanEngine::doRequestUpdate()
- 
-     QMacAutoReleasePool pool;
- 
--    NSArray<NSString *> *wifiInterfaces = [CWWiFiClient interfaceNames];
-+    NSArray *wifiInterfaces = [CWWiFiClient interfaceNames];
-     for (NSString *ifName in wifiInterfaces) {
-             scanThread->interfaceName = QString::fromNSString(ifName);
-             scanThread->start();
-diff --git a/src/plugins/platforms/cocoa/qcocoascreen.mm b/src/plugins/platforms/cocoa/qcocoascreen.mm
-index afe14e623c..74d69c2fa1 100644
---- a/src/plugins/platforms/cocoa/qcocoascreen.mm
-+++ b/src/plugins/platforms/cocoa/qcocoascreen.mm
-@@ -127,7 +127,7 @@ void QCocoaScreen::updateProperties()
-     const qreal previousRefreshRate = m_refreshRate;
- 
-     // The reference screen for the geometry is always the primary screen
--    QRectF primaryScreenGeometry = QRectF::fromCGRect([[NSScreen screens] firstObject].frame);
-+    QRectF primaryScreenGeometry = QRectF::fromCGRect([[[NSScreen screens] firstObject] frame]);
-     m_geometry = qt_mac_flip(QRectF::fromCGRect(nsScreen.frame), primaryScreenGeometry).toRect();
-     m_availableGeometry = qt_mac_flip(QRectF::fromCGRect(nsScreen.visibleFrame), primaryScreenGeometry).toRect();
- 
-diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
-index df1ad82592..0318a4ff96 100644
---- a/src/plugins/platforms/cocoa/qcocoawindow.mm
-+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
-@@ -1704,7 +1704,7 @@ void QCocoaWindow::applyContentBorderThickness(NSWindow *window)
- 
-     if (!m_drawContentBorderGradient) {
-         window.styleMask = window.styleMask & ~NSWindowStyleMaskTexturedBackground;
--        [window.contentView.superview setNeedsDisplay:YES];
-+        [[window.contentView superview] setNeedsDisplay:YES];
-         window.titlebarAppearsTransparent = NO;
-         return;
-     }
-diff --git a/src/plugins/platforms/cocoa/qnswindow.mm b/src/plugins/platforms/cocoa/qnswindow.mm
-index c17ad47aba..a0f1dd38fb 100644
---- a/src/plugins/platforms/cocoa/qnswindow.mm
-+++ b/src/plugins/platforms/cocoa/qnswindow.mm
-@@ -230,7 +230,7 @@ static bool isMouseEvent(NSEvent *ev)
-     if (pw->frameStrutEventsEnabled() && isMouseEvent(theEvent)) {
-         NSPoint loc = [theEvent locationInWindow];
-         NSRect windowFrame = [self convertRectFromScreen:self.frame];
--        NSRect contentFrame = self.contentView.frame;
-+        NSRect contentFrame = [self.contentView frame];
-         if (NSMouseInRect(loc, windowFrame, NO) && !NSMouseInRect(loc, contentFrame, NO))
-             [qnsview_cast(pw->view()) handleFrameStrutMouseEvent:theEvent];
-     }
-@@ -257,7 +257,7 @@ static bool isMouseEvent(NSEvent *ev)
- + (void)applicationActivationChanged:(NSNotification*)notification
- {
-     const id sender = self;
--    NSEnumerator<NSWindow*> *windowEnumerator = nullptr;
-+    NSEnumerator *windowEnumerator = nullptr;
-     NSApplication *application = [NSApplication sharedApplication];
- 
-     // Unfortunately there's no NSWindowListOrderedBackToFront,
diff --git a/pkgs/development/libraries/qt-5/5.12/qtbase-revert-no-macos10.10.patch b/pkgs/development/libraries/qt-5/5.12/qtbase-revert-no-macos10.10.patch
deleted file mode 100644
index 29776518379d..000000000000
--- a/pkgs/development/libraries/qt-5/5.12/qtbase-revert-no-macos10.10.patch
+++ /dev/null
@@ -1,102 +0,0 @@
-Revert "Remove code paths for macOS < 10.11"
-
-This reverts commit 138a65e0cfa80b13fd018a01e7d8b33341a3cfd3.
-
-From 138a65e0cfa80b13fd018a01e7d8b33341a3cfd3 Mon Sep 17 00:00:00 2001
-From: Jake Petroules <jake.petroules@qt.io>
-Date: Thu, 8 Feb 2018 11:05:42 -0800
-Subject: [PATCH] Remove code paths for macOS < 10.11
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Change-Id: I5ae02d88aa3dcd97d1f2ebf6255a68643e5d6daa
-Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
-Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>
-Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
----
- .../fontdatabases/mac/qfontengine_coretext.mm            | 16 +++-------------
- src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm    |  6 +-----
- src/plugins/platforms/cocoa/qnswindowdelegate.mm         | 16 ----------------
- 3 files changed, 4 insertions(+), 34 deletions(-)
-
-diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
-index 98b753eff9..489d9cd031 100644
---- a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
-+++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
-@@ -47,18 +47,28 @@
- 
- #include <cmath>
- 
--#if defined(Q_OS_MACOS)
-+#if defined(Q_OS_OSX) && !QT_OSX_DEPLOYMENT_TARGET_BELOW(__MAC_10_11)
- #import <AppKit/AppKit.h>
- #endif
- 
--#if defined(QT_PLATFORM_UIKIT)
-+#if defined(QT_PLATFORM_UIKIT) && !QT_IOS_DEPLOYMENT_TARGET_BELOW(__IPHONE_8_2)
- #import <UIKit/UIKit.h>
- #endif
- 
- // These are available cross platform, exported as kCTFontWeightXXX from CoreText.framework,
- // but they are not documented and are not in public headers so are private API and exposed
- // only through the NSFontWeightXXX and UIFontWeightXXX aliases in AppKit and UIKit (rdar://26109857)
--#if defined(Q_OS_MACOS)
-+#if QT_MAC_DEPLOYMENT_TARGET_BELOW(__MAC_10_11, __IPHONE_8_2)
-+#define kCTFontWeightUltraLight -0.8
-+#define kCTFontWeightThin -0.6
-+#define kCTFontWeightLight -0.4
-+#define kCTFontWeightRegular 0
-+#define kCTFontWeightMedium 0.23
-+#define kCTFontWeightSemibold 0.3
-+#define kCTFontWeightBold 0.4
-+#define kCTFontWeightHeavy 0.56
-+#define kCTFontWeightBlack 0.62
-+#elif defined(Q_OS_OSX)
- #define kCTFontWeightUltraLight NSFontWeightUltraLight
- #define kCTFontWeightThin NSFontWeightThin
- #define kCTFontWeightLight NSFontWeightLight
-diff --git a/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm b/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm
-index 94f2125bad..272cd9f3dc 100644
---- a/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm
-+++ b/src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm
-@@ -162,7 +162,11 @@ QT_NAMESPACE_ALIAS_OBJC_CLASS(QNSOpenSavePanelDelegate);
-     // resetting our mCurrentDir, set the delegate
-     // here to make sure it gets the correct value.
-     [mSavePanel setDelegate:self];
--    mOpenPanel.accessoryViewDisclosed = YES;
-+
-+#if QT_OSX_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_11)
-+    if (__builtin_available(macOS 10.11, *))
-+        mOpenPanel.accessoryViewDisclosed = YES;
-+#endif
- 
-     if (mOptions->isLabelExplicitlySet(QFileDialogOptions::Accept))
-         [mSavePanel setPrompt:[self strip:options->labelText(QFileDialogOptions::Accept)]];
-diff --git a/src/plugins/platforms/cocoa/qnswindowdelegate.mm b/src/plugins/platforms/cocoa/qnswindowdelegate.mm
-index 057a4c2943..eb55e50622 100644
---- a/src/plugins/platforms/cocoa/qnswindowdelegate.mm
-+++ b/src/plugins/platforms/cocoa/qnswindowdelegate.mm
-@@ -103,6 +103,22 @@ static QRegExp whitespaceRegex = QRegExp(QStringLiteral("\\s*"));
-     return QCocoaScreen::mapToNative(maximizedFrame);
- }
- 
-+#if QT_MACOS_DEPLOYMENT_TARGET_BELOW(__MAC_10_11)
-+/*
-+    AppKit on OS X 10.10 wrongly calls windowWillUseStandardFrame:defaultFrame
-+    from -[NSWindow _frameForFullScreenMode] when going into fullscreen, resulting
-+    in black bars on top and bottom of the window. By implementing the following
-+    method, AppKit will choose that instead, and resolve the right fullscreen
-+    geometry.
-+*/
-+- (NSSize)window:(NSWindow *)window willUseFullScreenContentSize:(NSSize)proposedSize
-+{
-+    Q_UNUSED(proposedSize);
-+    Q_ASSERT(window == m_cocoaWindow->nativeWindow());
-+    return NSSizeFromCGSize(m_cocoaWindow->screen()->geometry().size().toCGSize());
-+}
-+#endif
-+
- - (BOOL)window:(NSWindow *)window shouldPopUpDocumentPathMenu:(NSMenu *)menu
- {
-     Q_UNUSED(window);
diff --git a/pkgs/development/libraries/qt-5/5.9/default.nix b/pkgs/development/libraries/qt-5/5.9/default.nix
index be84691e6c33..d1e9af299261 100644
--- a/pkgs/development/libraries/qt-5/5.9/default.nix
+++ b/pkgs/development/libraries/qt-5/5.9/default.nix
@@ -38,7 +38,7 @@ let
   srcs = import ./srcs.nix { inherit fetchurl; inherit mirror; };
 
   patches = {
-    qtbase = [ ./qtbase.patch ./qtbase-fixguicmake.patch ] ++ optional stdenv.isDarwin ./qtbase-darwin.patch;
+    qtbase = [ ./qtbase.patch ./qtbase-fixguicmake.patch ];
     qtdeclarative = [ ./qtdeclarative.patch ];
     qtscript = [ ./qtscript.patch ];
     qtserialport = [ ./qtserialport.patch ];
diff --git a/pkgs/development/libraries/qt-5/5.9/qtbase-darwin.patch b/pkgs/development/libraries/qt-5/5.9/qtbase-darwin.patch
deleted file mode 100644
index 875fba12e2fb..000000000000
--- a/pkgs/development/libraries/qt-5/5.9/qtbase-darwin.patch
+++ /dev/null
@@ -1,35 +0,0 @@
-diff --git a/src/plugins/bearer/corewlan/qcorewlanengine.mm b/src/plugins/bearer/corewlan/qcorewlanengine.mm
-index 341d3bc..3368234 100644
---- a/src/plugins/bearer/corewlan/qcorewlanengine.mm
-+++ b/src/plugins/bearer/corewlan/qcorewlanengine.mm
-@@ -287,7 +287,7 @@ void QScanThread::getUserConfigurations()
-     QMacAutoReleasePool pool;
-     userProfiles.clear();
- 
--    NSArray<NSString *> *wifiInterfaces = [CWWiFiClient interfaceNames];
-+    NSArray *wifiInterfaces = [CWWiFiClient interfaceNames];
-     for (NSString *ifName in wifiInterfaces) {
- 
-         CWInterface *wifiInterface = [[CWWiFiClient sharedWiFiClient] interfaceWithName:ifName];
-@@ -602,7 +602,7 @@ void QCoreWlanEngine::doRequestUpdate()
- 
-     QMacAutoReleasePool pool;
- 
--    NSArray<NSString *> *wifiInterfaces = [CWWiFiClient interfaceNames];
-+    NSArray *wifiInterfaces = [CWWiFiClient interfaceNames];
-     for (NSString *ifName in wifiInterfaces) {
-             scanThread->interfaceName = QString::fromNSString(ifName);
-             scanThread->start();
-diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
-index 5cd4beb..84919e6 100644
---- a/src/plugins/platforms/cocoa/qcocoawindow.mm
-+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
-@@ -320,7 +320,7 @@ static void qt_closePopups()
- + (void)applicationActivationChanged:(NSNotification*)notification
- {
-     const id sender = self;
--    NSEnumerator<NSWindow*> *windowEnumerator = nullptr;
-+    NSEnumerator *windowEnumerator = nullptr;
-     NSApplication *application = [NSApplication sharedApplication];
- 
- #if QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_12)
diff --git a/pkgs/development/libraries/qt-5/modules/qtbase.nix b/pkgs/development/libraries/qt-5/modules/qtbase.nix
index 92ac8a242013..68759a26e82a 100644
--- a/pkgs/development/libraries/qt-5/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtbase.nix
@@ -2,7 +2,7 @@
   stdenv, lib,
   src, patches, version, qtCompatVersion,
 
-  coreutils, bison, flex, gdb, gperf, lndir, patchelf, perl, pkgconfig, python2,
+  coreutils, bison, flex, gdb, gperf, lndir, perl, pkgconfig, python2,
   which,
   # darwin support
   darwin, libiconv,
@@ -78,17 +78,15 @@ stdenv.mkDerivation {
       [ libinput ]
       ++ lib.optional withGtk3 gtk3
     )
-    ++ lib.optional stdenv.isDarwin
-      # Needed for OBJC_CLASS_$_NSDate symbols.
-      [ darwin.cf-private ]
+       # Needed for OBJC_CLASS_$_NSDate symbols.
+    ++ lib.optional stdenv.isDarwin darwin.cf-private
     ++ lib.optional developerBuild gdb
     ++ lib.optional (cups != null) cups
     ++ lib.optional (mysql != null) mysql.connector-c
     ++ lib.optional (postgresql != null) postgresql;
 
   nativeBuildInputs =
-    [ bison flex gperf lndir perl pkgconfig python2 which ]
-    ++ lib.optional (!stdenv.isDarwin) patchelf;
+    [ bison flex gperf lndir perl pkgconfig python2 which ];
 
   propagatedNativeBuildInputs = [ lndir ];
 
@@ -199,26 +197,11 @@ stdenv.mkDerivation {
       ''-DNIXPKGS_LIBXCURSOR="${libXcursor.out}/lib/libXcursor"''
     ]
 
-    ++ (
-      if stdenv.isDarwin
-      then
-        [
-          "-Wno-missing-sysroot"
-          "-D__MAC_OS_X_VERSION_MAX_ALLOWED=1090"
-          "-D__AVAILABILITY_INTERNAL__MAC_10_10=__attribute__((availability(macosx,introduced=10.10)))"
-          # Note that nixpkgs's objc4 is from macOS 10.11 while the SDK is
-          # 10.9 which necessitates the above macro definition that mentions
-          # 10.10
-        ]
-      else
-        lib.optional libGLSupported ''-DNIXPKGS_MESA_GL="${libGL.out}/lib/libGL"''
-        ++ lib.optionals withGtk3
-          [
-            ''-DNIXPKGS_QGTK3_XDG_DATA_DIRS="${gtk3}/share/gsettings-schemas/${gtk3.name}"''
-            ''-DNIXPKGS_QGTK3_GIO_EXTRA_MODULES="${dconf.lib}/lib/gio/modules"''
-          ]
-    )
-
+    ++ lib.optional libGLSupported ''-DNIXPKGS_MESA_GL="${libGL.out}/lib/libGL"''
+    ++ lib.optionals withGtk3 [
+         ''-DNIXPKGS_QGTK3_XDG_DATA_DIRS="${gtk3}/share/gsettings-schemas/${gtk3.name}"''
+         ''-DNIXPKGS_QGTK3_GIO_EXTRA_MODULES="${dconf.lib}/lib/gio/modules"''
+       ]
     ++ lib.optional decryptSslTraffic "-DQT_DECRYPT_SSL_TRAFFIC";
 
   prefixKey = "-prefix ";
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebengine.nix b/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
index 91b7acf43654..fb838283b1b1 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebengine.nix
@@ -79,7 +79,7 @@ qtModule {
     cat <<EOF > src/3rdparty/chromium/build/mac/find_sdk.py
 #!/usr/bin/env python
 print("${darwin.apple_sdk.sdk}")
-print("10.10.0")
+print("10.12.0")
 EOF
 
     cat <<EOF > src/3rdparty/chromium/build/config/mac/sdk_info.py
@@ -102,22 +102,6 @@ EOF
       --replace 'libs = [ "sandbox" ]' 'libs = [ "/usr/lib/libsandbox.1.dylib" ]'
     '');
 
-  NIX_CFLAGS_COMPILE =
-    lib.optionalString stdenv.isDarwin [
-      "-DMAC_OS_X_VERSION_MAX_ALLOWED=MAC_OS_X_VERSION_10_10"
-      "-DMAC_OS_X_VERSION_MIN_REQUIRED=MAC_OS_X_VERSION_10_10"
-
-      #
-      # Prevent errors like
-      # /nix/store/xxx-apple-framework-CoreData/Library/Frameworks/CoreData.framework/Headers/NSEntityDescription.h:51:7:
-      # error: pointer to non-const type 'id' with no explicit ownership
-      #     id** _kvcPropertyAccessors;
-      #
-      # TODO remove when new Apple SDK is in
-      #
-      "-fno-objc-arc"
-    ];
-
   preConfigure = ''
     export NINJAFLAGS=-j$NIX_BUILD_CORES
 
diff --git a/pkgs/development/python-modules/matplotlib/2.nix b/pkgs/development/python-modules/matplotlib/2.nix
index 810f37b4b136..5a45b02a240b 100644
--- a/pkgs/development/python-modules/matplotlib/2.nix
+++ b/pkgs/development/python-modules/matplotlib/2.nix
@@ -60,7 +60,7 @@ buildPythonPackage rec {
       url = "https://github.com/matplotlib/matplotlib/commit/2980184d092382a40ab21f95b79582ffae6e19d6.patch";
       sha256 = "1c0wj28zy8s5h6qiavx9zzbhlmhjwpzbc3fyyw9039mbnqk0spg2";
     })
-  ] ++ stdenv.lib.optionals stdenv.isDarwin [ ./darwin-stdenv-2.2.3.patch ];
+  ];
 
   # Matplotlib tries to find Tcl/Tk by opening a Tk window and asking the
   # corresponding interpreter object for its library paths. This fails if
diff --git a/pkgs/development/python-modules/matplotlib/darwin-stdenv-2.2.3.patch b/pkgs/development/python-modules/matplotlib/darwin-stdenv-2.2.3.patch
deleted file mode 100644
index ca399b4e6841..000000000000
--- a/pkgs/development/python-modules/matplotlib/darwin-stdenv-2.2.3.patch
+++ /dev/null
@@ -1,10 +0,0 @@
---- a/src/_macosx.m	2015-10-30 00:46:20.000000000 +0200
-+++ b/src/_macosx.m	2015-11-01 14:52:25.000000000 +0200
-@@ -6264,6 +6264,7 @@
- 
- static bool verify_framework(void)
- {
-+    return true;  /* nixpkgs darwin stdenv */
- #ifdef COMPILING_FOR_10_6
-     NSRunningApplication* app = [NSRunningApplication currentApplication];
-     NSApplicationActivationPolicy activationPolicy = [app activationPolicy];
diff --git a/pkgs/development/python-modules/matplotlib/darwin-stdenv.patch b/pkgs/development/python-modules/matplotlib/darwin-stdenv.patch
deleted file mode 100644
index 27ed8fc9f964..000000000000
--- a/pkgs/development/python-modules/matplotlib/darwin-stdenv.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff -ruN matplotlib-3.0.0/src/_macosx.m matplotlib-3.0.0.patched/src/_macosx.m
---- matplotlib-3.0.0/src/_macosx.m	2018-09-16 00:35:21.000000000 +0200
-+++ matplotlib-3.0.0.patched/src/_macosx.m	2018-11-03 13:14:33.000000000 +0100
-@@ -2577,6 +2577,7 @@
- 
- static bool verify_framework(void)
- {
-+    return true;  /* nixpkgs darwin stdenv */
-     ProcessSerialNumber psn;
-     /* These methods are deprecated, but they don't require the app to
-        have started  */
-
diff --git a/pkgs/development/python-modules/matplotlib/default.nix b/pkgs/development/python-modules/matplotlib/default.nix
index d3ea365082cd..cbdd43af811f 100644
--- a/pkgs/development/python-modules/matplotlib/default.nix
+++ b/pkgs/development/python-modules/matplotlib/default.nix
@@ -52,8 +52,7 @@ buildPythonPackage rec {
     ++ stdenv.lib.optionals enableQt [ pyqt4 ];
 
   patches =
-    [ ./basedirlist.patch ] ++
-    stdenv.lib.optionals stdenv.isDarwin [ ./darwin-stdenv.patch ];
+    [ ./basedirlist.patch ];
 
   # Matplotlib tries to find Tcl/Tk by opening a Tk window and asking the
   # corresponding interpreter object for its library paths. This fails if
diff --git a/pkgs/games/gargoyle/darwin.patch b/pkgs/games/gargoyle/darwin.patch
deleted file mode 100644
index 6958fe495d26..000000000000
--- a/pkgs/games/gargoyle/darwin.patch
+++ /dev/null
@@ -1,64 +0,0 @@
---- a/garglk/fontmac.m
-+++ b/garglk/fontmac.m
-@@ -167,7 +167,7 @@ static void propfont(char *file, int style)
-     }
- }
- 
--static NSMutableArray<NSURL *> * gli_registered_fonts = nil;
-+static NSMutableArray * gli_registered_fonts = nil;
- static NSDistributedLock * gli_font_lock = nil;
- 
- void fontreplace(char *font, int type)
-@@ -181,7 +181,7 @@ void fontreplace(char *font, int type)
-     NSFontDescriptor * fontFamilyDescriptor =
-         [[NSFontDescriptor fontDescriptorWithFontAttributes: nil] fontDescriptorWithFamily: fontFamily];
- 
--    NSArray<NSFontDescriptor *> * fontMatches =
-+    NSArray * fontMatches =
-         [fontFamilyDescriptor matchingFontDescriptorsWithMandatoryKeys: nil];
- 
-     for (NSFontDescriptor * sysfont in fontMatches)
-@@ -259,7 +259,7 @@ void fontload(void)
- 
-     // obtain a list of all files in the Fonts directory
-     NSString * fontFolder = [[NSString stringWithUTF8String: env] stringByAppendingPathComponent: @"Fonts"];
--    NSArray<NSString *> * fontFiles = [[NSFileManager defaultManager] contentsOfDirectoryAtPath: fontFolder error: nil];
-+    NSArray * fontFiles = [[NSFileManager defaultManager] contentsOfDirectoryAtPath: fontFolder error: nil];
- 
-     // create a collection to hold the registered font URLs
-     gli_registered_fonts = [NSMutableArray new];
---- a/garglk/launchmac.m
-+++ b/garglk/launchmac.m
-@@ -556,7 +556,7 @@ static BOOL isTextbufferEvent(NSEvent * evt)
-                          <GargoyleApp, NSApplicationDelegate, NSWindowDelegate>
- {
-     BOOL openedFirstGame;
--    NSMutableDictionary<NSNumber *, GargoyleWindow *> * windows;
-+    NSMutableDictionary * windows;
-     NSConnection * link;
- }
- - (BOOL) launchFile: (NSString *) file;
---- a/garglk/ttsmac.m
-+++ b/garglk/ttsmac.m
-@@ -30,7 +30,7 @@
- #import "sysmac.h"
- 
- // a queue of phrases to feed to the speech synthesizer
--static NSMutableArray<NSString *> * phraseQueue = nil;
-+static NSMutableArray * phraseQueue = nil;
- static NSRange purgeRange;
- 
- @interface SpeechDelegate : NSObject <NSSpeechSynthesizerDelegate>
-@@ -96,10 +96,10 @@ void gli_initialize_tts(void)
-             NSString * lang = [NSString stringWithCString: gli_conf_speak_language
-                                                  encoding: NSUTF8StringEncoding];
- 
--            NSArray<NSString *> * voices = [NSSpeechSynthesizer availableVoices];
-+            NSArray * voices = [NSSpeechSynthesizer availableVoices];
-             for (NSString * voice in voices)
-             {
--                NSDictionary<NSString *, id> * attr = [NSSpeechSynthesizer attributesForVoice: voice];
-+                NSDictionary * attr = [NSSpeechSynthesizer attributesForVoice: voice];
-                 if ([lang isEqualToString: [attr objectForKey: NSVoiceLocaleIdentifier]])
-                 {
-                     [synth setVoice: voice];
diff --git a/pkgs/games/gargoyle/default.nix b/pkgs/games/gargoyle/default.nix
index e645a40aa752..62ea798e4656 100644
--- a/pkgs/games/gargoyle/default.nix
+++ b/pkgs/games/gargoyle/default.nix
@@ -34,8 +34,6 @@ stdenv.mkDerivation {
   buildInputs = [ SDL SDL_mixer SDL_sound gtk2 ]
     ++ stdenv.lib.optionals stdenv.isDarwin [ cf-private smpeg libvorbis ];
 
-  patches = [ ./darwin.patch ];
-
   buildPhase = jamenv + "jam -j$NIX_BUILD_CORES";
 
   installPhase =