
A recent article by Tony Smith from The Register titled "
Mac OS X 10.3 Panther will not be a 64-bit OS" caused a good deal of confusion with many people, including me. It is also caused a
heated argument here on OSNews. The basic point of the article is that Mac OS 10.2.7 and 10.3 are not "true" 64-bit OSes, but the article does not clearly explain what a "true" 64-bit OS is. This had led to a lot of claims that the article is false or misinformed, rather than just unclear, which is certainly is.
here's a link that will answer your question
http://www.linuxppc64.org/
Linux at this moment can run natively on Power 4 systems from IBM, if yeah go looking through the workstation section of their site yeah notice that when you order a Power 4 system you can either have AIX or Linux installed on it.