Hi, I have a MBP running Tiger with the original discs that came with my MBP. I am planning to move to OS Leopard OR Snow Leopard. I am getting a (Mac computers service) company to do a complete check and erase install on my system. So how do i know if the OS that they put on my system is original or pirated or something? I am paying them, so I need to be sure I am paying to have an original put in. I will not be getting a disc... they said the install will be from their 'diagnostics'... whatever that means. But I am worried about having problems, incase I end up having a pirated version. So how can I be sure its not pirated?