Mac Malware Can Abuse Legitimate Apps to Spy on Users
OS X Malware Can Silently Record Video by Piggybacking on Webcam Streams
Mac malware could silently spy on users by piggybacking on webcam sessions initiated by legitimate applications such as FaceTime, Skype and Google Hangouts, a researcher has warned.
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Story added 6. October 2016, content source with full text you can find at link above.