Apple has released Mac OS X 10.8.2 with security updates for Snow Leopard, Lion, Mountain Lion, iOS and iTunes – along with a single sign-on feature for Facebook and a Java patch.
Apple recommends that users upgrade using System Update, which can determine what fixes are already installed on the system, thus lightening the heft of the download.
As for the Facebook angle, users can now opt to have Facebook contact information integrated with the Mac’s native Contacts and Game Center applications. Users gain a single sign-on and the ability to be alerted to Facebook activity via Mac OS X's Notification Center.
===> UPDATE!!! <===