Apple Seeds OS X 10.9.2 Beta 4 to Developers
Apple today seeded the fourth beta version of OS X 10.9.2 to developers. This release comes a week after the third one. To this day Apple has been seeding 10.9.2 for a month. This version is a very small download, indicating there isn't much added. However, Apple is still asking developers to focus their testing on mail, messages, graphics drivers, VoiceOver, VPN, and SMB2. 10.9.2 includes FaceTime audio, ability to block users when using FaceTime and iMessage, and bug fixes.
Developers can update to beta 4 in the Mac App Store > Updates > Software update > OS X 10.9.2 beta 4. If you don't have 10.9.2 yet you can download it for the first time in the Mac Developer Center.