Hi, I have heard that you can, I have a tiger mac with the system requirements for leopard, and I have seen various articles on the web about how to do this, but I don't know if they are legitimate or not. Created by a mac person or a person who was giving bad advice. I have just received my leopard disk from apple yesterday, and if someone could help with advice or point me in the right direction to where there is legitimate advice that would be greatly appreciated. Thanks in advance!!!