Apple released the second beta build OS X 10.9.2 to developers today, nearly a month after the first beta was released. Developers can grab Build 13C39 from the Mac Dev Center, or by running a software update if you’re already running the first beta.
The seed notes don’t list any new features, but ask devs to focus on Mail, Messages, graphics drives, VoiceOver, VPN and SMB2. The last beta added FaceTime over audio to the Messages and FaceTime apps. Apple also seeded the first beta of Safari 6.1.2 to developers that looks like it’s mostly filled with bug fixes.
Source: Apple
