Open source anti-theft solution for Mac, PCs & Phones Prey 100% geolocation aware Prey uses either the device's GPS or the nearest WiFi hotspots to triangulate and grab a fix on its location. It's shockingly accurate. Know your enemy Take a picture of the thief with your laptop's webcam so you know what he looks like and where he's hiding. Powerful evidence. Watch their movements Grab a screenshot of the active session -- if you're lucky you may catch the guy logged into his email or Facebook account!