Hello, new to this forum. Spent many hours last two weeks digging and searching in these topics and found lots of great info. Thanks. My problem in a nutshell is a used PowerMac dual 2.7 having some issues with Tiger and iTunes. Do not have the original disks, so I bought a retail version of Apple 10.4.11 Tiger that I am awaiting arrival of to reinstall the os. Hopefully this will cure what ails my PowerPC. Now if I decide to upgrade to 10.5 Leopard do I need to find a retail version of 10.5.8 to use as this is the highest version of Leopard my PowerMac will take or can I use 10.5.1 or 10.5.4 and then use Apples site to update to 10.5.8? Or does Apple no longer support Leopard. My apologies if this has been answered before but all my searches did not yield any answer to this question. Thanks again.