Hey, So I am trying to sell my Macbook Pro. It came to me from Amazon with OS Lion preinstalled, but when I scanned the serial online the device was originally a Snow Leopard machine. I heard that if I want to sell the device I need to put it back to its original factory OS, which is SL, but I never got the disks in my packaging even though it was new. Did Amazon tamper with my package? I want to sell this MBP with OS Mountain Lion but it's tied to my apple ID, so what would I have to do to be able to let the buyer use the MBP for himself, without being bothered by my Apple ID? I'm so confused.