Hi all, I am new to the forums. I have a late 2007 macbook pro that I got at the dump. The original HD was gone so I bought a new one and installed it and a charger. Today a friend loaned me Snow Leopard and I tried to install it but got this message: "Snow Leopard requires Mac OS X 10.5 or later to already be on the system" Well, there is no OS on the system, no backup, nothing, just the bare drive that I installed. How do I install an OS on a bare system? Do I just need a current OS with an install disk or something? Or do I have to install an earlier OS (which one?) and upgrade to the most current? (Will any version of OS install itself or is an install disk a separate disk?) Any help is greatly appreciated.