To set your Mac permissions to allow screensharing on Tangle, follow these instructions:

1. Start a call in Tangle
2. Click screenshare
3. A prompt will pop up with a padlock. Click 'Open System Preferences'
   
4. A new window will open up with various permissions. Locate the lock on the bottom left of the window, and click it.
5. Enter your password
6. Scroll down til you see Tangle in the list on the right panel, and select it.
7. Another small window will pop up, select 'Quit & Reopen'
8. Wait 5 seconds for Tangle to reopen OR click the Tangle icon if it does not reopen on its own.

Done!