Hi Julie, You must buy into System 10. Wait and buy 10.5 for about $120. if you are going to upgrade to a G4. 10.5 may not run on a G3. My Cube is running 10.4.10 with a 1.2 mhz G4 upgrade. Works great every day. HD at 120 GB which is max. and 1 gb of memory. Cheers Roy On Jul 1, 2007, at 7:52 PM, Julie Manno wrote: > _______________________________________________ > Cube mailing list > Cube at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/cube > > Listmom is trying to clean out his closets! Vintage Mac and random > stuff: > http://search.ebay.com/_W0QQsassZmacguy1984