Some applications such as Microsoft Teams may wish to access your webcam and microphone. In newer versions of macOS you need to give applications permission. To do this:


  1. Open System Preferences
  2. Click on the "Security and Privacy" in System Preferences
  3. Click on "Privacy" along the top, then "Microphone" and "Camera". Find the application you want in the list, and tick the box
  4. Close out of the program that needs camera or microphone access and re-open it.