/etc/yaboot.conf

boot=/dev/hda9
device=hd:
partition=12
root=/dev/hda12
timeout=30
install=/usr/lib/yaboot/yaboot
magicboot=/usr/lib/yaboot/ofboot
defaultos=macosx

image=/boot/kernel-2.4.24-wyw
label=Linux
read-only

macosx=/dev/hda10