The real questions are these: ‘What can we do to prevent the Mac from being stolen or lost?‘ And, the followup: ‘What can we do to find the Mac when it gets lost or stolen?‘
Allow me the privilege of ignoring the answer to the first question, and jump to the second. Apps that claim to track your Mac after it’s been lost or stolen are not really ‘theft protection.’ The theft (or, loss) isn’t being protected or prevented.
Really, it’s more like recovery. That’s what Hidden does. It’s a way to help recover a missing Mac, iPhone, or iPad. For Mac users, Hidden hides in the background, captures whatever a thief enters on the keyboard through a keylogger, captures iSight photos of the thief (or, whoever found your Mac but hasn’t tried to return it yet), grabs screenshots of what the thief does while using your Mac, and sends out location data so the Mac can be tracked.
If your Mac goes missing then you notify Hidden through an online control panel, and when your Mac comes online Hidden goes to work to capture and send data so you can track down the Mac’s whereabouts.
From what I can see, Hidden works much like Undercover, one of the first popular Mac tracking apps (Mac only).
Hidden is free to try for 10 days after which, if you still want to use it, there’s a subscription fee to pay which starts at $1.25 per month per device, but the per-device price drops substantially as you add more devices (good for a household with many devices, or a business).
In my tests, Hidden worked much like Orbicule’s Undercover system which has a one-time price for the app and service. I did not try the iPhone and iPad apps. The 10-day trial is sufficient to test Hidden on a Mac.