If the OS9 disk is one that comes with OSX, I don't believe you can boot from that. I believe it is a restore type disk. You may need to install OS9 onto the hard drive and then boot into OS9 on the hard drive, from OSX. I'm not talking about booting classic. Then, you can make a bootable OS9 CD. I cannot boot from my OS9 install disk either. STeve << Hi Again, Well, I zeroed my disk, reinstalled 10.4 with os9 drivers, and it still will not boot from os9 cd, I'm at a loss. Thanks to all of you who offered your thoughts, I wish I could remember what I had to do to make it work last time. Thanks again, Bob >>