Re:Ask HN: Where can I find a primer on how computers boot?
by alexjm on Wednesday March 22, 2023 @02:05PM
(#35264852)
Another resource for how Apple silicon Macs boot is the "EFI Jumpstart" chapter of "Apple File System Reference", which starts off with a section about the boot process.
https://developer.apple.com/go/?id=apfs-file-format-spec