by cakeplaterotella » Jun 27th, '13, 06:42
Wasn't that. This computer is too old for that, I think (EFI 1.0, 2006). I can't find a way to access the firmware on a Mac or even check if it's on if it is there. You did sort of point me in the right direction, though. Thanks.
When I accidentally installed GRUB to the MBR on my first Mageia install attempt, I used fdisk -u to get rid of it, and that rewrote the first entry to EFI Protected. Afterwards, none of the distros I tried to install booted. This morning, I used Boot Camp Assistant to make a FAT partition to pretend that I was installing Windows, and it updated the entry to EFI (just normal EFI). Odd sort of fix, but now things boot correctly.