Getting really frustrated with the Mac boot process. Has someone actually documented this properly, or do I really need to play a random guesswork game until I stumble upon something that works?
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It supports: - Booting from APM, MBR or GPT style partition schemes. - Booting from: :/boot.efi, :/efi/boot/bootx64.efi, :/System/Library/CoreServices/boot.efi. Booting via CSM isn't really supported anymore as of 2015-era MacBook Pros, UEFI boot is used instead.
Dammit I love you Sarah. Lack of CSM explains first failed attempt from a late 2015 iMac. Trying EFI with bootx64.efi next.
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