Does anyone know the easiest way to switch Macs with someone else? There are two MacBook Retinas in my house - I have 512gb and my brother has 256gb. Brother ran out of space so we want to switch... how would we be able to swap computers while preserving all the files/programs/settings/data? I'm pretty sure I'll have to use an external drive but I'm not sure what specifically to do - any help/advice would be greatly appreciated. Thanks in advance!