John B., thanks for the reply. What Rich said - if I understood correctly.. For use as Classic, OS9 should be on the same partition as X, but for use as a bootable system it should be on a different partition? Meaning two OS9 installs? Right now on my new internal drive I put OS9 and X on different partitions, and was planning to use that OS9 system for Classic apps. Are you saying that's not good to do, and that 9 for Classic designation should be on the same partition as X, and I should do another OS9 install on the X partition? margaret