We found that this feature worked without a hitch on our 13-inch Retina display MacBook Pro. The OS automatically displays any notifications on your lock screen so you can see what you missed as soon as you wake your laptop. With Mavericks, you don't need to worry about missing notifications while you're away. If you deny push notifications the first time you visit a website, you can change it later by navigating to the Notifications tab in System Preferences for Safari.
This means that news headlines or shopping alerts can now appear as notifications on your desktop. After updating to 10.9, you'll notice that some websites such as Gilt or The New York Times will ask if you'd like to receive Push Notifications on your desktop. Click to EnlargeTaking a page from iOS, OS X is now capable of pushing notifications from your favorite Web pages to the desktop.