Yesterday my MacBook Pro stolen from me and when I am trying to track it from find my mac it doesn't show anything. My friend told me that if the thief clean install the mac with newer OS ( I had 10.6, my friend told me if the thief clean install mountain lion). then even if he uses the mac, I wont be able to track the mac. Again some post in random site suggested that until and unless I take out the mac from my icloud i will be able to detect the location of the mac by using the mac addres even if it is clean installed. So my question is, if the thief clean installed the newer version of MAC OS. Is there any way I can track the mac. will apple notify me if the thief tries to use that macbook after clean install and tries using the icloud again( from his account), since I believe that icloud is sync through the mac with its mac address. Any help from your side will be really helpful. I am just browsing different sites to get the hint of how to trace my mac.