Re: GRUB2 (packaged with Ubuntu 12.10) won't boot OS X

[Chris Murphy]

On Nov 7, 2012, at 3:43 PM, Alex Kanavin <address@hidden> wrote:

> 2012/11/7 Chris Murphy <address@hidden>:
> 
>> Of course it could be a bug *shrug*. But are you booting the Mac CSM-BIOS 
>> mode? Or EFI mode? I've only tested it in CSM-BIOS mode and it did work on 
>> model MacbookPro 4,1 (2008).
> 
> EFI I guess. How do I find out and switch between modes?

What are you using as the first boot manager? The built-in one using option key 
at startup chime, or rEFIt/rEFInd?

> 
>> I haven't tested it EFI mode. Only very recent versions of GRUB 2 full have 
>> all the Red Hat produced EFI patches from GRUB Legacy rolled into it (by 
>> very recent I mean just in the last few months - and I'm not sure if even 
>> Ubuntu 12.10 has these) so I'd consider anything non-recent to be unreliable 
>> for Mac EFI booting.
> 
> That could be the case, yeah. Ubuntu is using version 2.00 from end of
> june 2012, with a lot of patches on top.

Yeah hard to say which patches on top.

Chris