I have a 2,2 GHz Santa Rosa MacBook Pro. This model was released in mid-2007, when it still came with Tiger. I got mine in January of this year, with Leopard pre-installed. Here's the thing: I want to be able to play Age of Mythology multiplayer again with my girlfriend, which is not possible in Leopard. I made a 20GB partition on both my girlfriend's MacBook as well as my own MacBook Pro. First, I installed Tiger on the MacBook, on the 20GB partition. Everything went fine and it now perfectly boots Tiger and Leopard. I was also sucessfully able to transfer that partition to my MacBook Pro with the Disk Utility. However, when I try to boot into that partition, my MacBook Pro gets a kernel panic. It also panics when I try to boot from the MacBook Tiger discs. This leads to my question: is a Leopard machine able to run Tiger?