An LCD Monitor
A cable. Mine is VGA.
An adapter to Mini Display Port
Connect the cable to an adapter.
Plug it in the Mini Display Port
Plug the other end of the cable into the monitor.
And there you have it! A two-display Mac!
The following are some different setups you can do with the second monitor
Here is how you mirror the display. Your monitor will display exactly the same as on your Mac.
Here is how to change the main screen to be on the second display.
Here is how you rearrange the displays to make them on the same alignment.
And that's it guys! Enjoy your Mac with two display! All the likes are a lot appreciated! :)