How to disable Chrome Incognito mode on macOS

Turning off Chrome Incognito Mode on Mac

1. Click the Finder icon in the Dock, from the Go menu, click Utilities.
2. Click to open the Terminal application.
3. Run the following command: defaults write com.google.chrome IncognitoModeAvailability -integer 1.
4. Restart the Mac for the changes to apply.