If you have more than one IR-equipped computer at the same location, youll probably want to pair each computer with a specific Apple Remote. Pairing sets the computer to take commands only from the specified remote. You can pair your computer with only one remote at a time.
1. Hold the remote close to the computer (3 to 4 inches away) and point the remote at the front of the computer.
2. Press and hold both the Menu and Next buttons on the remote until the paired-remote graphic appears on your screen (about 5 seconds).
To remove the pairing, open System Preferences, click Security, and click the Unpair button. Your computer will now take commands from any remote.
To prevent your computer from being controlled by any remote, select Disable remote control infrared receiver in the Security preferences pane.