@bogo_lode right - he's not selling the Mac. He just wanted to know if he needed to redeem them before he restored the Mac using the recovery partition. He's a new Mac user and wants to undo his initial explorations.
@sophistifunk I still don't get how that works with divisibility. If you have a bitcoin, and someone gets your keys and transfers half a coin to themselves, how do you know you only have half a bitcoin left?