I just want to try out an emulator so I'll have a Rainbow OS on my MacMidTowerHack & X will only be on there for kicks.

I'll probably only really only use ubuntu on it, but with backlit Rainbow Apples on the sides OS 9.0.4 seems to be in order.

But this is to be the expandable Mac Mini/MacMidi that was never released in the y2k era.

When did X stop supporting OS9?