How to Unblock Notifications On Mac

macOS Monterey or Newer

If your device is running macOS Monterey or newer, go to the Apple Menu > System Preferences > Notifications. Select the app you wish to have notifications for and ensure that "Allow Notifications" and "When mirroring or sharing the display" are checked. Complete these steps for any other apps you wish to receive notifications from.

macOS Ventura example:

On devices running Monterey, Do Not Disturb has been moved to a section in the System Preferences called Notifications and Focus. The settings in Focus are typically turned off by default, but we recommend going into these settings and checking that Do Not Disturb is disabled during the time you are using Luna. This can be found by going to Apple Menu > System Preferences > Notifications and Focus > Focus > Toggle Do Not Disturb off.