[OpenBIOS] QEMU OpenBIOS booting?

Dave Willoughby drdavew at austin.rr.com
Wed May 20 15:51:36 CEST 2009

On Apr 19, 2009, at 3:31 AM, Laurent Vivier wrote:

> Le dimanche 19 avril 2009 à 10:03 +0200, Andreas Färber a écrit :
>> Am 19.04.2009 um 09:50 schrieb Steven Noonan:
>>> On Tue, Apr 14, 2009 at 10:46 PM, Steven Noonan
>>> <steven at uplinklabs.net> wrote:
>>>> On Sun, Apr 12, 2009 at 1:39 AM, Laurent Vivier
>>>> <Laurent at lvivier.info> wrote:
>>>>> OpenBIOS is not able to boot MacOS X.
>>>> Well, that's a silly limitation. Is there a reason this isn't
>>>> implemented? I see that the Mac-on-Linux OpenBIOS version has such
>>>> support, so it seems strange that the QEMU version does not.
>>> I don't know if anyone here is actually interested (this list seems
>>> -very- quiet), but...
>>> I've been hacking at OpenBIOS for a bit, and I got it to properly  
>>> read
>>> Mac OS X discs (it kept failing because it would hit an Apple
>>> Partition Map header instead of an HFS+ filesystem header). I'm
>>> working on adding an XCOFF loader, too, so it should be able to boot
>>> Mac OS X soon.
>>> Any chances I could get these changes merged to the main OpenBIOS  
>>> tree
>>> once they're done?
>>> My current working repository is at http://github.com/tycho/ 
>>> openbios.
>>> I'm working on the macosx-boot branch. The relevant commit is here
>>> (patch also attached):
>>> http://github.com/tycho/openbios/commit/4722c8a01d186a08183de49759dc8b7b74cf41c9
>>> Thoughts?
>> Your work surely sounds interesting. However, making OpenBIOS boot
>> from the disks is not everything there is to it. Alexander Graf had
>> once posted a series of patches for making Mac OS X boot in QEMU,
>> including changes/additions to device emulation. They were not  
>> merged,
>> not sure about the status today.
> Alexander made a work to boot Intel Mac OS X.
> It works very well with KVM (I use it).
> http://alex.csgraf.de/
> See the HowTo http://d4wiki.goddamm.it/index.php/ 
> Howto:_Mac_OSX_on_KVM .

I'm trying the Mac_OSX_on_KVM Howto above.

I'd like to boot an existing, bootable Mac OS X 10.5.5 GPT formatted,  
external USB HDD, which boots fine on my 4,1 MBP.

Does anyone know if Alexander's kvm-osx-bootloader can boot real, host  
managed HDDs, or is it dependent on something associated with disk  
image files, created by qemu-img?

I don't have the message in front of me now, but I think I was getting  
"device not found" when I used -hda /dev/sdc or -hda /dev/sdc1.

>> One issue iirc was that you need to obtain some Apple ID from a real
>> Mac of yours and pass that to QEMU for it to work.
> I don't think it is needed with powerPC MacOS X.
> I seems OpenHackware was able to boot powerPC MacOS X. Perhaps we  
> should
> look at it.
> Regards,
> Laurent
> -- 
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> Free your System - May the Forth be with you

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