Mini Display/Thunderbolt Port to VGA Adapter for Apple Macs - New 

This is a generic brand but is compatible with all MacBooks and MacBook Pros. 

This adapter lets you connect a monitor, projector or LCD that uses a VGA  connector or cable to a MacBook®, MacBook® Pro or MacBook® Air with a mini  display port for easy connectivity.  Equivalent part # MB572Z/A.

Product Features

Compatible with MacBook, MacBook Pro and MacBook Air with a Mini Display Port 

For expanded connectivity.

Connect a monitor, projector or LCD

So you can enjoy a larger display at home or give outstanding presentations at  work.

Compatible with mini display port

Located on most newer MacBooks

Here's how to set up video mirroring:

1) Connect and turn on your additional display

2) From the Apple menu, choose System Preferences

3) Choose Displays

4) Click the Arrangement tab

5) In the lower-left corner of the Arrangement pane, select "Mirror Displays"