[...]
If we could get Apple PowerMac machines to boot from a FAT filesystem, the licensing
issue with hfsprogs would no longer be a headache. According to Apple's documentation,
booting from a FAT boot partition should work [4] but I have never gotten around to
testing that.
So, if anyone has the time and enthusiasm to be able to get an Apple PowerMac to boot
off a FAT partition, please give it a try and let me know. If it works, we can replace
the current bootloader installation in grub-installer [2] and fix the issue for good.