http://www.emulators.com/softmac.htm

I know virtually nothing about macs, so I don't know if this would take you back far enough to the platform your program is from, but maybe it's worth a look.

For what it's worth, the Atari emulator works flawlessly on this computer ( XP ). All the Atari music programs I have are just as quirky ( but in a good way too ) as they were on the original Atari platform.

AJ