Because Thunderbolt handles both data and DisplayPort video, you connect your Mini DisplayPort-enabled display--or another display using a Mini DisplayPort adapter--to the Thunderbolt port, or you daisy-chain it to other Thunderbolt devices, as noted below.

Remember, every Thunderbolt port includes both DisplayPort and PCI Express connections. Which means a Thunderbolt port can handle the same types of video and audio--displays with greater than 1080p resolution and up to eight channels of audio--as a DisplayPort port. When it comes to video, the main limitation is your graphics card. For example, the new MacBooks support an external display up to 2560 by 1600 pixels at millions of colors, in addition to the built-in display in either mirroring or dual-display mode. On a desktop Mac, the Thunderbolt port would support two high-resolution displays. You can connect a Mini DisplayPort-enabled display directly, or a DisplayPort, HDMI, DVI, or VGA display using an adapter.