Ive installed the PPC version of Ubuntu 12.04 on a external firewire drive but the drive does not show up when I hold down alt-option at boot. The only thing that shows is my OSX internal drive. Ive pretty much tried everything and just cant get it to recognize the FW drive as a boot option. My only guess is that the yaboot config is not correct but in order to make any changes to that I need to be logged on with Ubuntu on that drive? Any help would be appreciated and I can give more info if asked. Thank you.