On 08.06.2012 20:34, Chris Murphy wrote:

> a.) Mac Mini's EFI implementation can use either MBR or GPT schemes for booting.
> 
> b.) If this is a dual boot situation, Mac OS X is EFI only, effectively requires GPT and an EFI System partition. Your particular Linux distribution support of Apple's unique EFI, which is not UEFI, determines whether you will boot Linux or Windows or whatever you're booting, either in EFI mode, or CSM (BIOS emulation) mode.
> 

Wrong. EFI doesn't require GPT or other round. Mac OS X installer will
refuse to install on GPT but if you force it, Mac OS X will be able to
boot alright. Also Mac OS doesn't use EFI system partition other than
for firmware updates.

> c.) If CSM is required for the foreign OS, and this particular Mac mini, then GRUB2 EFI is inapplicable. You'd use GRUB2.

> And it necessarily means the nasty situation of hybrid MBR (disk appears to be MBR to the foreign OS, and appears to be GPT to Mac OS).
> 

You mix again 2 things: you can boot in BIOS mode (CSM) on pure GPT as
well. Windows is an exception since Microsoft pretends that possible is
impossible.


-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko