Hello All I'm new here, and will like to seek some advice. I'm running Mountain Lion, and recently I received an email with a video file. I opened the video file, and the sender later informed me there were some metadata attached to it. My social network details were then compromised as the details were sent to the sender. How do I resolve this and clean up the system? I can think of reformatting the whole mac to clean it, but will I have to reformat any external drives attached to the Mac as well? I have a external hard disk attached to the mac. Any advice is greatly appreciated, thanks!