Hi! hope everyone is doing well. I really don't know the answer of this question though I searched online but I think it's considered a silly question that is why I couldn't find an answer. What is the difference between Mountain Lion and Leopard? are they both like operating systems like doing the same job of windows for windows laptops? And my macbook is new and I updated the software and it says version 10.7.4, does this mean that I don't need to download OS X mountain lion update from apple store? Please bear with me and thanks in advance.