If you need access to more than a single peripheral while using your MacBook Air, you will need a hub to increase your productivity. Otherwise, you will find yourself in the clumsy position of plugging and unplugging devices as you work. And that's really not what you envisioned when you saw yourself with your shiny new MacBook, is it ? Macally to the rescue with both 3-port and 7-port hubs to keep you streamlined.