Teams is not letting me share my screen on MacOS.

Here is the steps on how to enable to share your screen on Teams for MacOS. 

1: Go to  System Preferences, Security and Privacy, click on the lock to unlock permission to make changes, then select Screen Recording, put a check mark on Microsoft Teams.

2: Lock the gold lock and close out of the System Preferences window. Restart Microsoft Teams and you will now have the ability to share your screen.