It’s tandem operating system updates for Apple today. After rolling out iOS 6 this morning, as promised, the company issued an update for OS X Mountain Lion, its desktop operating system. OS X 10.8.2 is a major update to Mountain Lion with some important new features — one in particular: Facebook integration. Also on board: Support for Passbook, Apple’s location-aware mobile wallet app, and some tweaks to iMessage and FaceTime that route messages and video chats to the Mac. Read the full story at All Things D.