Hi all, I have the late 2009 Mac Unibody with version 10.6.8 with 2GB 1067 MHz memory that I use everyday for college. First off, I just want to say that I am not a computer person so if you respond with any technical computer term, you might have to dumb it down for me since I don't know any computer lingo. I want to upgrade my macbook because it is pretty old and some new flash player updates require at least 10.7 or later. I want to upgrade to Yosemite but I heard you need at least 4 GB or space? What's the next best thing to upgrade to for my macbook? I heard that 10.7 lion is okay and won't slow down my comp. Is that true?