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

[Chris Murphy]

On Nov 7, 2012, at 3:00 PM, Alex Kanavin <address@hidden> wrote:

> 2012/11/7 Chris Murphy <address@hidden>:
>>>> Does "chainloader (hd0,gpt2)/System/Library/CoreServices/boot.efi" work?
>>> 
>>> Nope - same error.
>> 
>> From the linux installation have you tried running grub-mkconfig -o 
>> /boot/grub/grub.cfg to make sure the built-in grub scripts have had a chance 
>> to locate OS X and create the proper entry? I've had this work for me, at 
>> least from CSM-BIOS booting a > Mac. I haven't tried it with EFI booting a 
>> Mac yet (primarily because Fedora 18 is just now getting to GRUB 2 EFI plus 
>> mactel-boot support)…
> 
> Yes - this is done by Ubuntu itself. Those entries made with stock
> grub scripts result in OS X kernel panics - read my original message,
> it has links to screenshots.

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). 

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.

Chris Murphy