Hi, I've installed Ubuntu 12.10 on a late-2009 Mac Mini with OS X 10.6.8, and while the computer's firmware loads Grub fine, and Grub loads Ubuntu without problems (except Ubuntu's splash screen is missing, I can live with that), I get kernel panics when trying to load OS X in either 32 or 64 bit mode. The menu entries for them were generated from standard scripts in /etc/grub.d/.
Have a look at screenshots (apologies for the blur, if you need exact messages, I can try to take sharper pictures): http://sensi.org/~ak/tmp/12110004.jpg http://sensi.org/~ak/tmp/12110006.jpg I have also attempted to boot OS X via simple EFI chainloading: ak@MacMini:~$ cat /boot/grub/custom.cfg menuentry "OS X" { insmod hfsplus insmod part_gpt insmod chain set root='(hd0,gpt2)' chainloader /System/Library/CoreServices/boot.efi } but I'm getting this error: "not a valid root device". I assure you that gpt2 is a perfectly valid and bootable OS X partition - I can still boot it from Mac's firmware by holding Alt during boot :) Any ideas how to diagnose this further? -- Alexander
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