Hi all, Have a mid-2010 MacBook and recently downloaded Mavericks, but my computer feels slower. I have placed an order for extra ram (to get to 4GB) in the hope it will bring it back to speed. Question is, should I have installed Mavericks in the first place? Should I consider going back to Mountain Lion? I haven't used Time Machine, but I don't have masses of files on my MacBook, but I am curious if you think I need to do that. Many thanks for help and advice.