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MBP 13" 2017, macOS 10.15.7, FaceTime 5.0

After about 10 seconds of trying it pops up the message below:

enter image description here

Restarting my computer does fix the problem. However, even without restarting my computer, other apps are all able to use the camera. Photobooth, Microsoft Teams, and Zoom all attach to the camera and use it. They all do so simultaneously. But without a reboot FaceTime cannot, even if I quit all those other apps. The problem recurs from time to time, with weeks in between sometimes.

I have an external USB camera, and the laptop lid is closed. In the camera menu for FaceTime AND other apps, the internal camera is greyed out, and only the USB one is available, and selected.

[ Edit ] In response to comment from @IconDaemon here is the state of Facetime's camera menu when this error occurs. USB Camera is selected and active. Built in camera is grey (because lid is closed). This is AFTER a reboot. Again, Facetime cannot access camera but ALL OTHER APPs can. Photobooth, Zoom, Teams, Camtasia ... they all work perfectly.

enter image description here

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  • Try leaving the external camera disconnected for a day to see if the error recurs.
    – IconDaemon
    Mar 19 at 18:38
  • @IconDaemon then what? If the problem does recur then what do I do? If the problem does not recur then what do I do? I've noted that it recurs with a period of weeks, not days or hours. So if it does not recur after a day of having the camera disconnected, I have no new information.
    – jay613
    Mar 21 at 11:48
  • Leave the external camera connected for now. Next time this happens, in the FaceTime app > Video menu, make sure the external camera has been selected, not the System Setting default, which is the internal camera. For some unknown reason, it may be switching back to the default. If you've already tried this without success, please add it to your question as a list of your troubleshooting steps.
    – IconDaemon
    Mar 21 at 15:45
  • @IconDaemon I added to the question that Facetime is using the correct external camera.
    – jay613
    Mar 26 at 15:05
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People upgrading to iOS 13.4 or macOS Catalina 10.15.4 have found that their devices can no longer connect to older iOS devices running iOS 9.3.6 or earlier or Macs running OS X El Capitan or earlier. Some say the problem also occurs when trying to call people using versions of iOS 10. And others have found this problem when using a Mac with macOS Catalina 10.15.4 for older versions of iOS and OS X versions.

With this problem, Facetime gets stuck in a "connection" for both incoming and outgoing calls.

To fix these issues, upgrade to iOS and iPadOS 13.4.1 or higher. For Macs running macOS Catalina, update macOS to the latest version of macOS (Apple has released an additional update for macOS Catalina 10.15.4.)

Apple says the problem has been fixed in these versions and above.

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  • Welcome to Ask Different. Great to have a new contributor. Please note that these forums work well when questions and answers are focused on a particular problem and its solution. This answer (1) proposes a solution to a problem that is different o the one asked, and (2) makes general recommendations about versions when the OP’s version is provided in the question. You might like to take the tour.
    – jay613
    Mar 21 at 11:45

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