I am sure this has been asked somewhere else but I am not putting in the right search words I guess. Anyway, I have 2 macbook pro 13" laptops and both have mountain lion on them. 1 is a early year 2011 macbook pro 1 is a summer 2012 macbook pro Does this come with mountain lion or is this an app I have to buy for both? If so what app do you recommend, why and approx cost? Thank you for taking the time to write back!