Experience the Difference 

The Mini DisplayPort to HDMI Adapter offers true output flexibility. You can output video from all Mini DisplayPort or Thunderbolt equipped Macs via one cable to a high definition monitor or TV. You can output BOTH digital audio* and video for a true one cable solution for all your A/V needs

With this 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 HDMI Adapter to connect a high definition monitor or television, that includes a HDMI connector. Review the documentation or check with the manufacturer of your monitor or TV to make sure you're choosing the right adapter

(*These Apple computers support video signal only (no audio) over Mini DisplayPort:iMac (Early 2009) and (Mid 2009), Mac Mini (Early 2009) and (Late 2009), Mac Pro (Early 2009), MacBook (Late 2009), MacBook (13-inch Aluminum Late 2008), MacBook Pro (Late 2008, Mid 2009, and Early 2009) )