Actually, Apple has stated that every release of OS X does not support processor upgrades. It doesn't mean it won't run, just that they won't help you out if it doesn't. :-) John On Oct 9, 2003, at 12:49 AM, david sarcastix wrote: > http://www.apple.com/macosx/upgrade/requirements.html > >> Confirm that your hardware can run Mac OS X Version 10.3 Panther >> Mac OS X Version 10.3 requires a Macintosh with a PowerPC G3, G4, or >> G5 >> processor, built-in USB; at least 128MB of physical RAM and a >> built-in display >> or a display connected to an Apple-supplied video card supported by >> your >> computer. Mac OS X does not support processor upgrade cards. Verify >> your >> hardware is supported from the list below.