If you’ve been holding out for a truly new MacBook from Apple, you probably won’t be thrilled by the just-released Mid 2014 edition of the MacBook Air ($899+). The updated model has seen a minor speed bump and lower prices compared the last update. While the speed increase may not compel you to go out and buy a whole new machine, they certainly don’t hurt the thin laptop’s appeal to those who are already in the market for one.…