Mike, adding the line macosx=/ht at 0,f2000000/pci at 3/k2-sata-root at c/k2-sata at 0/disk at 0:8 (8 is my OS X partition number. It's probably different for you) to your /etc/yaboot.conf and then running ybin should let you boot into OS X. -- iMac G5 will freeze after booting up https://launchpad.net/bugs/23445