My experiences with yaboot_0.5 are getting more interesting the more I play with it.
I started giving the Open Firmware boot command silly arguments out of frustration, and got some interesting results. Apparently, I can pick random files that are sitting right beside yaboot_0.5 on the same HFS slice, and get a message that indicates that the boot command was at least able to locate the file, but so far no indication that it can even find the yaboot_0.5 binary itself... boot hd:vmlinux.benh.15 <--- silly load-size=264466 adler32=(something) Loading ELF CLAIM failed ok boot hd:yaboot.conf <--- very silly load-size=4b adler32=b24b1919 unrecognized Client Program format Yet something not so silly yields... boot hd:yaboot_0.5 Can't open hd:yaboot_0.5