Hello: I was looking into the Macbook Air since the Macbook Pros and the new Airs are very expensive, so I decided to go to refurbished to save on costs. Here are some of my questions. Is it worth buying a refurbished Macbook Air with 4 GB of RAM or should I be looking for 8 GB instead? Will the new Mavericks software work on a Macbook Air with 4 GB or would I have to use 8 GB of RAM? The Twitter @TheAppleSupport said "It will run" which seems this is a fake Twitter account not associated with Apple. Since I prefer a wired connection, do I have to buy the attachment which is the USB to the ethernet cable attachment in order to have a hard wired connection? Just looking for some opinions because I am very intrested in getting a Macbook Air, but don't want to try and make too many sacrifices.