Apple has begun seeding Mac OS X Lion 10.7.3 build 11d16 to registered developers, accompanied with Lion 10.7.3 server. Focus areas of this latest Lion 10.7.3 build are Address Book, iCal, Mail and iCloud document storage.
Apple’s Release Note:
OS X Lion 10.7.3 build 11D16 Seed Note
OS X Lion Update 10.7.3 is an update to OS X Lion 10.7.
The OS X Lion 10.7.3 Update (Combo) updates
- OS X Lion 10.7, 10.7.1 or 10.7.2 GM builds.
The OS X Lion 10.7.3 Update (Delta) updates
- OS X Lion 10.7.2 GM builds.
Please be aware that you will not be able to revert back to your previous system after updating. Please install this update on a system you are prepared to erase if necessary.
You can download Mac OS X Lion 10.7.3 or Mac OS X Server 10.7.3 via Dev Center.