

Let the full Catalina version be available in the market and then update. Lastly, in case, none of the above solutions fix iMessage not working on macOS 10.15, then your MacBook Pro might not be compatible with the macOS 10.15 beta versions.Wait for a few seconds or restart your device and again sign in to your account with the Apple ID to let the app work properly. To restore the iMessage app can go to iMessage and then from the Preferences tab, you can display the account settings to sign out.You can access the Date & Time option from the System Preferences tab and select the checkbox saying Set Date & Time Automatically to fix this issue.

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Enabling the iMessage account on your MacBook Pro is a must.If not, then this bug has nothing to do with the 10.15 version update. First and foremost, make sure that your device has a good internet connection.Check out the below pointers to understand the possible fixes for fixing iMessage not working on macOS 10.15.
