Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Were Is Facebook Integration In OS X Mountain Lion ?
There has been a lot of confusion since OS X Mountain Lion launched yesterday over were is the promised Facebook integration. A story on Fortune today only add even more confusion to the public as they said that there was going to be no Facebook integration in OS X Mountain Lion as Apple had dropped the feature.
This is in no way correct. When Apple showed of Facebook integration at WWDC 2012 they clearly stated that this feature would come in a update in the fall. Apple’s website also clearly states the Facebook features are “Coming Soon”.
You may have seen Facebook Integration in some review video or print screens such as the above these have surfaced because reviewers were give a full version of OS X Mountain which included the Facebook integration for review purposes.
We will continue to follow this story and update you on any changes in the future!
OS X Mountain Lion