Earlier quoted context omitted.
> teensiest bit of cooperation Apple did put in the effort to cooperate when they added support to boot other OSes. Apple hasn’t prevented anyone from running Linux, they simply haven’t written Linux drivers for their hardware or provided a manual to do so. Most of the effort in Asahi Linux is going to be writing drivers for hardware that hasn’t had Linux drivers written for it. It makes sense that a Linux driver doe…
Apple never added support to boot other OSes on arm macs.
https://twitter.com/NikolajSchlej/status/1339790008589242369 https://twitter.com/XenoKovah/status/1339914714055368704
Although you cannot turn off secure boot on Arm Macs, Apple has deliberately provided a path by which you can prove that you really want to chainload to a user provided bootloader not signed by Apple. From there, obviously, it will be possible to load the kernel of another operating system, such as Linux.