How does "Find my Mac" work, since there's no GPS in a Mac? I have used "Find my Mac" to find our Macbook Pro. It was pretty accurate and was able to place the computer within 10 feet of its actual location. I started thinking about how it actually works, since the MBP doesn't have a GPS. How does "Find my Mac" work?
It checks what Wifi networks are in range and then looks up their locations in a big database of known Wifi access points -- I think Apple use the Skyhook database.