512MB of memory is the minimum requirement to install Leopard. But Leopard is a memory hog, and really I would suggest a minimum of 1GB. I run Leopard on my PowerMac G4 with a 1GHz CPU and 1.3GB RAM, and it's fine. Eric S. ron burgher wrote: > I HAVE A 10.28, G 4, 1 GHZ, POWER PC, 256 MB MEMORY iMAC. AM I RIGHT IN > ASSUMING THAT I CANNOT UPGRADE TO LEOPARD? > > > ------------------------------------------------------------------------ > > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4