Beginning with macOS Catalina 10.15, Apple introduced new security controls to better protect your computer. For example, apps are now required to ask your permission before accessing your webcam, microphone, or recording/sharing your screen. This has a direct impact on Microsoft Teams as all of these settings must be allowed to use MS Teams at its full capacity. 

If you are using a Mac with the Teams client installed and are unable to share your screen, or your meeting attendees report only seeing a black screen, please do the following: 


  1. Check your macOS version – the following steps are only available in macOS 10.15 Catalina and above.  To check your macOS version click the ‘Apple’ icon in the top left corner, then select “About This Mac”. 

  1. If you’re running macOS 10.15.x or greater continue on: 

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  1. Open System Preferences – Click the ‘Apple’ icon in the top left corner, then select “System Preferences”.  From the window that appears, select “Security & Privacy”. 

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  1. Unlock to make changes  Click the padlock in the lower left corner of the window. Enter your computer username and password – this will allow you to make the necessary changes.  (Note: this window is asking for your mac password, not your HU password.) 

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  1. Allow Teams to access Screen Recording – You will need to allow Teams to access your Camera, Microphone, Accessibility, Files and Folders, and Screen Recording.  Camera and Microphone access usually has already been activated, but Screen Recording usually is not.   

To allow Screen Recording, select Screen Recording from the left column, scroll through the list of applications to the right, and make sure that Teams is checked. 


  1. Repeat for other services - If you also are having trouble sharing your webcam, microphone, or files, make sure to also repeat the previous step for these items. 

  • Camera 

  • Microphone 

  • Accessibility 

  • Files and Folders