Apple seeded build 12E47 of OS X 10.8.4 to developers
From MacRumors:
OS X 10.8.4 Build 12E47 Seeded to Developers
As with previous beta releases, Apple continues to ask developers to focus on Wi-Fi, Graphics Drivers, and Safari.
The update is available through the software update tool in the Mac App Store and Apple's Developer Page.
OS X 10.8.4 Build 12E47 Seeded to Developers
