Hey folks. I own a Macbook Air 2012 13" 1.8/8gb/256 computer. I haven't updated to OSX mavericks yet. I'm thinking if should i just upgrade it or do a factory restore then install osx mavericks. Thing is, I have a ton of travel videos I want to finish editing and tons of raw pictures I want to finish editing in lightroom before installing osx mavericks. But not sure if it's going to make a difference. I use iMovie for video editing to upload to youtube, and I'm really quite familiar with it, and I dont want to really learn how to edit with the new version of iMovie until i finish my work. i dont have any problems with my computer at this time. just need opinions as to what i should do? also whats the difference between clean install?