The date this notification was actually delivered.
- macOS 10.8–10.14Deprecated
The notification center will set this value if a notification is put in the scheduled list and the delivery time arrives.
If the notification is delivered directly using the
deliver(_:) method of the
NSUser class, this value is set to the
delivery value. If the
nil this value is set to the current date.
This value is used to sort the list of notifications in the user interface.