I've searched around quite a bit and can't seem to find an answer, so thought I'd ask here. Any help is much appreciated. Just bought a MacBook Pro, got all the data transferred to it from my Mac mini, and now I'm looking to erase all my data from the Mac mini and reinstall an OS and then sell it. So far I've only been able to erase the data, by holding the option key on startup and using the disk utility there. When I try to then reinstall the OS it asks for my Apple ID. I stopped there just because I don't want my data associated with that computer. Also, I tried to de-authorize the Mac mini in iTunes and it says I have to wait 12 months. Not sure why it says that, or if I even have to worry about that at this point. I did upgrade the HDD to an SSD, so maybe that's why I have to wait. So, how do I go about getting an OS on the Mac mini without any of my data on there so I can then sell it?