I used to own a 2.8 imac with Leopard but sold this and used the firewire transfer to copy everything across. Everything seems to work ok apart from the odd glitch or application bomb out and I looked in software update to find that it said it had imac software updates in there. Will these updates affect the Pro in any way? I thought if there were patches applied to the OS files then I would be using imac patched files and this may cause problems otherwise I guess certain imac patched files may be recognised and not run? not entirely sure on this so am asking for help.... Should I reinstall Leopard from scratch, I currently use time machine and if i need to reinstall what would be my best option?