Recover a stolen Mac with free tracking software
Originally Posted by cnetMore info > Hidden - The most advanced theft tracking software for your Mac.When you activate tracking, Hidden will locate your stolen computer anywhere on the planet, collect photos of the thief and screen shots of the computer in use. (We also collect lots of nerdy network information, but we won?t bore you with the details!)
The Hidden team will also help you work with the police when recovering your stolen computer.
Note: Their website recommends a firmware password to prevent a clean reinstall, incase a thief attempts to remove the tracking software. Apple's support site explains how to do that. Setting up firmware password protection in Mac OS X