Previous Fedora for Power Releases
Fedora 17 for Power was announced on June 14th, 2012. Please see the release notes for additional details or download it from your closest mirror. It has been most extensively tested on IBM Power systems, but is also known to work on Apple Mac G5 systems.
Fedora 16 for PPC64 was released Dec. 23th, 2011. It is available on several mirrors which are listed here.
It is known to work on the new Power7 machines and on PowerMac G5 with > 1Gb RAM. Installations on machines with less RAM might work, but that is untested yet (feedback welcome).
A fresh installation for F16 if you're currently using a pre-release is highly recommended so that you can verify that all reported and closed as fixed bugs have really been addressed in the final F16 release.
If the installation fails, here is a HOWTO for an install that requires you to have a system with an older RHEL or Fedora installation and that doesn't use the usual anaconda installer.
On the mirrors are also install media and packages for PPC (32bit) Those are completely untested and any bugreports without patches attached that fix the issue will most likely be deferred atm as we're concentrating on 64bit as that's the only hardware that the developers currently have. We have to rely on the community to provide fixes for 32bit problems.
If you want to help out with testing, please report any problems on IRC or in bugzilla (make sure to set the architecture to 'powerpc'). Feedback about installations on older hardware such as 32bit PowerMac G4 is appreciated, but as we're focusing on 64bit machines it might take some time to fix 32bit issues unless patches are attached to the bugreports.
The last Fedora release for PPC before F16 was Fedora 12 and can be found at http://download.fedoraproject.org/pub/fedora/linux/releases/12/Fedora/ppc/iso/