Hello, I've just brought Apple Macbook Air 1.1 (Core 2 Duo L7500, 1.6 Ghz, 13.3"). It will arrive tomorrow morning. It have 2GB RAM Memory, and I wish to switch it with 4GB, or just add another 2GB. The reason is that I want to re-install with Mavericks, which will load slowly on 2GB (I think). Is it possible? Thanks!