Hi, What will happen after I download the software update for MAC OS X Lion? Right now I am using 10.6.8 and I want to update to 10.7. After I download the update, can I get the .dmg of MAC OS X Lion? So that I can burn it and create my backup. I am asking this because I haven't tried downloading paid apps. Another question, can I still download Mac os x Lion (purchased) again in Mac App Store?