Update to OS X Mountain Lion Developer Preview 3 Released
Apple has issued an update to OS X Mountain Lion Developer Preview 3. The new build comes as 12A193i and is available through Software Update, which in turn downloads through the Mac App Store, making the update available to all developers with OS X Mountain Lion DP3 currently installed.
Noticeable changes in the new OS X 10.8 build are to Mission Control, Messages, System Preferences, Notifications Center, iCloud integration, and Preview app, but otherwise there do not appear to be significant differences in the Developer Preview 3.1 update. Of course, many bug fixes and resolutions to issues identified in the previous build have also been included, and an update to XCode 4.4 Developer Preview 4 was released alongside the update to build applications for the latest developer release.