I wrote a story on how I worked around the installer problems: http://bildrulle.nu/tech/ubuntu-imac.html
Maybe it helps! // Joakim -- xubuntu fiesty on imac ppc "NewWorld" has blank screen https://launchpad.net/bugs/86066 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs