On Dec 25, 2008, at 5:32 PM, Peter Wigglesworth wrote: > Any suggestions on what to do to get the OS10.3 booting up? According to the free program "MacTracker", your cube requires a firmware update to "PowerMac G4 Cube Firmware Update 4.1.9" Run the updater program and your problem may be solved. You may be able to find it in a folder on the OS-9 install CD. Otherwise, go to the Apple web site to download it.