@millihertz Oh my! I still have a couple of old Macs that have Open Firmware and I never realized that the language is Forth actually.
It's really odd that Apple had already been using Open Firmware with PowerPC, but still went with EFI on switching to Intel.
@millihertz Exactly!
What's worse, it wasn't even UEFI-compliant at first! It was a nonstandard implementation in Macs up to 2011 models! That is why only Macs newer than 2012 were up to spec to boot Windows in EFI mode, with earlier models you had to resort to Boot Camp — Apple's BIOS emulation 🫠