Red Hat E3 Linux for PPC
During the second half of the year, Red Hat plans to launch Enterprise Linux 3, which will include support for servers running Itanium 2, IBM's PowerPC-based processors and AMD's upcoming Opteron processor.
http://www.informationweek.com/story/IWK20030319S0003
http://www.informationweek.com/story/IWK20030319S0003
Comments
http://www.redhat.com/software/eserver/pseries/
It doesn't run on Macs, though.