SO, i have a macbook pro that was given to me from a client. It was dropped and the harddrive must have jarred but is inoperable. I replaced the HD. I do not have any media to go along with the laptop. HOW DO I LOAD AN OS? I (being a windows support tech for 15 years) thought i could dl a via a torrent an OS to load, tried all that i could find about 15 different ones of starting with 10.5 - 10.6.7 and couldn't get any to load. I either get the screen frozen or a prompt that says OS cannot be loaded on this system. I've even tried to DL some macbook pro OS's. What can i do?