> As you might expect, the firmware for these machines is not available
> under a redistributable license; however, every owner of one of these
> machines is implicitly licensed to posess the firmware, and the OS
> packages containing it are available under well-known URLs on Apple's
> CDN with no authentication.
>
> Our plan to support this is to propose a platform firmware mechanism,
> where platforms can provide a firmware package in the EFI system
> partition along with a manifest, and distros will extract it to
> /lib/firmware on boot or otherwise make it available to the kernel.
>
> Then, on M1 platforms, our install script, which performs all the
> bootloader installation steps required to run Linux on these machines in
> the first place, will also take care of copying the firmware from the
> base macOS image to the EFI partition. On T2 platforms, we'll provide an
> analogous script that users can manually run prior to a normal EFI Linux
> installation to just grab the firmware from /usr/share/firmware/wifi in
> the running macOS.