Right so in May this year I had my 2012 11inch Macbook Air stolen from my car. The laptop was running Find My Mac. The laptop was running Mavericks. The laptop was encrypted with Filevault. The laptop had a password on the account. The laptop was sleeping in my bag when it was stolen. A few days later I got an email to say it had been found at a location some 30 miles away from my house. The police went round to try and find it but nothing came of it. Upon it being found I then locked it using Find My Mac. My questions are: If they take the hard drive out can they use the laptop with a new hard drive? What would they need to unlock the locked mac? If they format the mac does that mean the tracking is then useless? Does the locked state mean the laptops effectively useless? What happens if the hard drive is removed and read on a different mac could they still access the encrypted data? I'm worried that my data could be at stake if they successfully managed to unlock the laptop somehow. I fail to see how someone could just buy it and start using it again just like that. Can apple flag the serial as stolen?