The new MacBook, MacBook Pro, and MacBook Air each have a Mini DisplayPort 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 VGA Adapter to connect your MacBook, MacBook Pro,
or MacBook Air to a standard analog monitor, projector, or LCD that uses a VGA
connector or cable. Review the documentation or check with the manufacturer of
your monitor to make sure you're choosing the right adapter.
Compatible only with MacBook, MacBook Pro, and MacBook Air with Mini DisplayPort.