Thanks for the quick reply, but no, I'm not talking about ScummVM... although, I hadn't thought of that option. The PC disk is way back in Vancouver, so it's not really an option.
No, what I meant was, I found a place where I can download the Mac version of Loom (you can't even buy it anymore anyway), but it's only 16 colours, and I understand that Mac SCUMM (part of this website chain, I think) has a patch available to make it PPC compatible (and upgrade it to 256 colours somehow).
If not, no biggie, I just got a false lead, then. But this website was mentioned specifically.