Apple Store Macbook Pro DVI and VGA Adapter questions - what is in the box?
The video out on MacBook Pro uses a Displayport / Thunderbolt port. To hook up to a VGA or DVI cable, you need an adapter. Alternatively you could buy a cable which has Displayport on one end and DVI or VGA on the other. The adapters don't come as standard so you'll need to buy one in an Apple store, online or use a third-party cable.