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MacOS Big Sur black screen when screen sharing in zoom App

ByCorporate Guider Home, Zoom

It is possible that there will be a black screen when sharing content with others in a meeting or webinar when using Zoom for MacOS, on a device running Apple’s Big Sur operating system, and using a wired internet connection. UDP packets larger than a certain size may not be properly transmitted on macOS Big Sur.

Resolving the issue

We recommend leveraging a wireless connection until Apple releases a fix for this issue in its next MacOS update. Zoom screen sharing settings can be changed to use TCP if you need a wired connection.

  • Log in to the Zoom desktop client.
  • Select your profile picture, then click Settings.

  • Select Share Screen.
  • Select Advanced.
  • Select Use TCP connection for screen sharing.

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