If you are using Mac Catalina and are unable to share your screen, or get a warning message that your computer permissions need to be changed, then you will need to update the privacy settings on your Mac.

• To open this pane on your Mac, choose Apple menu  > System Preferences, click Security & Privacy, then click Privacy.

• Ensure that Google Chrome and/or the relevant desktop app is selected and these settings are saved. See the screenshot below.

• You may also need to restart your browser for the changes to take effect.