Hi Guys, picked up my 2nd hand rMBP today. I formatted the disk and went to reinstall ML with my Apple ID except I only purchased Lion in the past. I have got round it by using my daughters Apple ID and it is downloading now. How can I swap to my Apple ID when its installed? I have no access to the MAC app store as she is away for a week. Can I login as my Apple ID purchase mountain lion and do a reinstall again? I want to purchase it and have it in my name.