With the introduction of OS X Mavericks, Apple has introduced a notification feature that allows websites to push updates to your desktop when new content posts.
How to subscribe to Safari Push Notifications
To take advantage of this feature, visit our site on a system running at least OS X Mavericks (10.9) and Safari 7 or higher.
A popup window will display:
Now, when 9to5Google publishes a new full story you’ll receive a push notification on your desktop.
How to unsubscribe from Safari Push Notifications
To unsubscribe from the notifications, head to Safari > Preferences > Notifications.