The Messages app on the Mac works exactly like its iPhone and iPad counterpart, allowing you to send iMessages to other Apple devices. If you prefer to keep messages separate, you can disable Messages in macOS by following these instructions.
These instructions will work for Catalina, but the steps may vary for older versions of macOS. This will turn off iMessages and SMS messages (if you have an iPhone) on your Mac, but maybe disable iMessage on an iPhone or iPad If you like.
Disable notifications in the Messages app on your Mac
Before disabling iMessage, The first must take into account turn off notifications for the Messages application. This will allow you to continue sending and receiving messages in the Messages application, but you will only be able to view the messages when you open the application.
To do this, open the System Preferences application. You can start this by clicking the Apple menu at the top left of the menu bar and then tapping «System preferences».
In the System Preferences application, click the option «Notifications».
In the menu «Notifications» In System Preferences, you’ll see a list of apps that can trigger notifications in a menu on the left. Scroll through this list and click on the option «Posts».
You can customize the way your notifications appear using the options shown in the section «Message alert style».
To prevent notification alerts from appearing at the top right, click the alert style option «No one».
To turn off all notifications in the Messages app, tap the slider «Allow message notifications». The switch will turn gray when turned off.
This will completely turn off all notifications in the Messages app, but you will still receive background messages and view them in the Messages app at any time.
Disable the Messaging on Mac application
If you prefer to completely disable the Messages app on macOS, it’s a fairly simple process. To get started, open the Messages application by clicking the Messages icon in the Dock.
If you removed it from the Dock, you can launch Messages from the Launchpad (which you can start by clicking the Launchpad icon on the Dock). Alternatively, you can start the application from the Applications folder in the Finder application.
You’ll need to go to the Message Preferences menu to turn it off. To do this, click Messaging> Preferences in the menu bar at the top of the Mac screen.
In the message preferences menu that appears, click the tab «iMessage». To completely disable the Messaging app, click the button «Exit» next to your Apple ID on the tab «Set».
If you prefer to keep your account connected, clear the checkboxes «Activate this account» Yes «Enable messages in iCloud».
Your settings will be applied automatically, so you can close the message preferences menu when you’re done. IM messages will no longer appear in the Messages application until you sign in again or reactivate your account.