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nixpkgs/nixos/doc/manual/installation/installing-usb.section.md

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# Booting from a USB Drive {#sec-booting-from-usb}
For systems without CD drive, the NixOS live CD can be booted from a USB
stick. You can use the `dd` utility to write the image:
`dd if=path-to-image of=/dev/sdX`. Be careful about specifying the correct
drive; you can use the `lsblk` command to get a list of block devices.
::: {.note}
::: {.title}
On macOS
:::
```ShellSession
$ diskutil list
[..]
/dev/diskN (external, physical):
#: TYPE NAME SIZE IDENTIFIER
[..]
$ diskutil unmountDisk diskN
Unmount of all volumes on diskN was successful
$ sudo dd if=nix.iso of=/dev/rdiskN
```
Using the \'raw\' `rdiskN` device instead of `diskN` completes in
minutes instead of hours. After `dd` completes, a GUI dialog \"The disk
you inserted was not readable by this computer\" will pop up, which can
be ignored.
:::
The `dd` utility will write the image verbatim to the drive, making it
the recommended option for both UEFI and non-UEFI installations.