On Jan 25, 2012, at 7:56 PM, Jim Moldenauer wrote: > Where can I find out what the newest operating system could be for a > Quicksilver 733-MHz PowerPC G4? OS 10.4.11 Such information is readily available at <Everymac.com> for any and all Mac models. <http://www.everymac.com/systems/apple/powermac_g4/stats/powermac_g4_733_qs.html >