Been trying to hunt this info down, but to no avail. I'm running a few PPC G5's (10.5.8) and MP's (10.6.8) and have a huge itunes library (4TB) and share the files (and library metadata, art, etc) between the various machines. (10.1 is the highest version that will work with my G5's ) Also have been running 10.1 for several years now and it has been perfect in every respect. (unlike itunes 11 which is a bloated, buggy pig...IMHO). Any one had any luck making it work? Thanks!