Alright, so I just bought myself a retro 1998 iMac, running OS 9 and I tried installing some custom themes, but the machine wouldn't recognize them. I also tried installing Kaidoscope, as I read that it was needed for some themes, and though my theme might have been one of those, but of course the app couldn't install either... The OS doesn't recognize it as an installer package for some reason, even though it has the .installer suffix. Anyone have any ideas? It's not really important, since the iMac isn't going to be a very used machine, but more of a collectible, however it kinda bugs me.