Hey guys my cousin is in a bit of a predicament, she has an older Macbook air, the one from 2008 that she has since stopped using after she bought her new Macbook Pro. Anyways, she said that I could use the Macbook for college until I can decide and buy an ultrabook for class. So what do I do if she has no idea what the password is? Could I just reinstall OSX? Because she doesnt need any of the data off it. Please help me figure it out if you have any idea what I can do. Thanks!