The attached patch adds gpt/mbr synchronisation to parted. It's limited to supporting 4 partitions right now, one of which is the EFI system partition, so it's not ideal - however, it should at least allow the system to be installable.
** Attachment added: "GPT/MBR synchronisation" http://librarian.launchpad.net/6603773/gpt.diff -- 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
