I'm currently running Snow Leopard (10.6.8) on my MacBook Pro (specs below) and am completely happy with it, except I'm finding more and more that new programs and updates are requiring 10.7 at minimum. I know that Mavericks is free, however reading about the many issues and warnings against installing in the App Store have me nervous. I love the way my Macbook operates right now....essentially just want to be able to most new programs and updates. Is it possible to upgrade to 10.7 or 10.8 instead of all the way to 10.9? I know this can't be done via the App Store any longer. Any advice would be hugely appreciated.