I just recently bought a new Macbook off of Craigslist in excellent condition with Snow Leopard 10.6.8. I am now trying to download Garage Band off of the App Store, but it says that I must have 10.9 or later. So to get 10.9, I assume that I would go and get Mavericks OS X, correct? Problem is that I don't know what type of Macbook I have, so therefore, I don't know how to make sure Mavericks will run. Any suggestions. All i want is Garage Band!!