Actually, I haven't been able to get the MacBook instructions to work on a Intel-based MiniMac. After trying a number of install attempts over several hours, Grub still failed to install properly. I eventually told the potential Ubuntite to give Fedora 6 a go, which smmes to explicitly support the intel Macs :-(
-- grub install fails on EFI Intel Macs https://launchpad.net/bugs/46853 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
