What's a MacBook Air to do in the case of a software emergency without an internal or external optical drive? Well, Apple's thankfully considered that situation, and has included a Software Reinstall USB drive with both the 11-inch and 13-inch models. As a bonus, it also makes an attractive addition to a keychain or necklace.New MacBook Airs come with Software Reinstall USB drive originally appeared on Engadget on Wed, 2
