Here is the situation: My sister's Macbook is outdated with Snow Leopard, I am so happy with Lion that I told her I was going to buy her a copy. here is the question? If I use my Apple ID to pay for the OS on her computer am I going to be the registered owner of that Macbook or she will always be the Owner? I don't want to her lose the authority over the Macbook just because I upgrade the OS. Anyone with this kind of situation?