237 Views 1 Reply Latest reply: Sep 11, 2013 6:35 PM by Linc Davis
I have just recently purchased a late 2012 macbook air without retina from my friend. I want to erase all his information and change it to mine. If I reset the system to the format when first get the computer will I lose the mountain lion its running on? Also, what is the proper way to reset the computer?