Booting MacOSX on powerpc?

[Aaron Kerr]

Heya,

To support the development grub2 for powerpc I am testing grub2 from cvs 
two days ago) on my ibook (G4).

I have successfully installed grub2 and can boot into linux.

I have been unable to work-out  how to boot in to MacOSX. When trying to 
use chainloader I get the following error message.

Booting 'MacOSX'
error: unknown command `chainloader'
Press any key to continue...

Any ideas?

Thanks,

aaron