The Mini DisplayPort to DVI Adapter lets you connect an advanced digital monitor to your Mini DisplayPort or Thunderbolt equipped Mac.
The Mac mini, Mac Pro, MacBook, MacBook Pro, and MacBook Air each have a Mini DisplayPort or Thunderbolt port that allows you to connect an external display or projector using an adapter. You can use an external display as your main workspace or to extend your desktop, or you can work in mirrored mode with a projector so you can view what your audience sees.
Use the Mini DisplayPort to DVI Adapter to connect to any high resolution display up to 24" that includes a DVI connector.