Hey all, little help needed as I'm not managing to work this out on my own. I installed Mavericks on my latest macbook air, and it's great! But my uni previously installed loads of rubbish software (anti virus and junk, hard to get rid of completely) so I want to start fresh! I don't have anything I want to keep on here so it's fine to just format the drive. But here's the problem, at the moment I can't follow the instructions to make a USB boot drive because when I try to re download Mavericks from the app store it just doesn't work (even when I click the "continue anyway" popup). The only other thing I can think of is internet recovery, but the internet recovery system for this macbook air is still on Mountain Lion and I can't figure out how to get it on Mavericks. So do I have to internet recovery to mountain lion and re download mavericks through the app store and RE RE FORMAT? Thanks in advance all!