GadgetTrak Mac utilizes advanced wi-fi positioning technology to identify where your Mac is with a high level of accuracy (10-20 meters). Unlike GPS, GadgetTrak's use of wi-fi networks to get location means no extra hardware needed. It works indoors and in dense urban environments, so thieves cannot hide inside of a building to block the location signal like they can with GPS.
Check for Wi-Fi Location Coverage In Your Area
Wi-fi positioning works in most major urban areas in North America, Asia and Europe. To find out if your area is covered type in your address and click "Find It". The blue indicates an area that is covered.