The new MacBook, MacBook Pro, and MacBook Air each have a Thunderbolt/ Mini DisplayPort that allows you to connect an external display or projector using 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.
This adapter will make sure you can:
1. Extend or mirror your workstation to another screen; Give presentation to your classmates, students or colleagues with your own MacBook or laptop;
2. Share videos with your friends and family on a bigger external screen or TV. In 2011, Apple introduced Thunderbolt port, which is essentially a Mini DisplayPort when used for audio/video.