You've been warned. Cover that webcam with a piece of tape. Mark Zuckerberg does it. FBI Director James Comey recommends you do it. But just putting a piece of tape over your webcam doesn't prevent a hacker from accessing your webcam or microphone.
However, a new app can help and it's free. Former National Security Agency staffer Patrick Wardle debuted OverSight on Thursday. It's a free tool for Macs that notifies you anytime someone has accessed the webcam or microphone on your computer. Not only is it a useful tool, your handy old piece of tape isn't able to do much to protect your microphone.
"OverSight constantly monitors a system, alerting a user whenever the internal microphone is activated, or the built-in webcam is accessed," the OverSight site reads. "And yes, while the webcam's LED will turn on whenever a session is initially started, new research has shown that malware can surreptitious piggyback into such existing sessions (FaceTime, Skype, Google Hangouts, etc.) and record both audio and video - without fear of detection."