Hello!
I recently updated my iMac (late 2015) to macOS Catalina and have lost function of iMessage.
The application will not respond (color wheel spins indefinitely), so I cannot even get to the menu or settings screen.
iMessage is crucial to me on a daily basis, so I need to get it working.
Please advise if you have any ideas how I can get this App up and running again.
Thank you!