I have found Micro Snitch to be very useful: https://obdev.at/products/microsnitch/index.html https://obdev.at/products/microsnitch/index.html "This ultra-lig

I have found Micro Snitch to be very useful: https://obdev.at/products/microsnitch/index.html https://obdev.at/products/microsnitch/index.html "This ultra-light menu bar application operates inconspicuously in the background. It monitors and reports any microphone and camera activity to help you figure out if someone’s spying on you."