- Choose Apple > System Preferences.
- Click Bluetooth.
- Click Advanced... in Mac OS X v10.5 or v10.6 or click the Settings tab in Mac OS X v10.4.
- Deselect the "Allow Bluetooth devices to wake this computer" checkbox.
- Click OK.
Alternatively, if you allow the Mac to wake, it will likely go back to sleep after the idle interval specified in its Energy Saver preferences.