MacRumors posted a story that Apple released a new version of OS X Yosemite to developers

The update, build 14A3429f, can be downloaded from the Mac App Store and through the Mac Developer Center. Apple has also released a Dictation Language update and Xcode 6 beta 6, though it appears the Xcode 6 software has been temporarily removed from the Developer Center. OS X Yosemite brings a flatter, more modern look to OS X, with an emphasis on translucency and redesigned dock, windows, and more. It also includes a multitude of new features, such as improved integration with iOS 8 through Continuity, a new "Today" view in Notification Center that offers integration with third-party apps, a retooled Spotlight search with new data sources, and several new features for apps like Mail, Safari, and Messages.

  Apple Releases OS X Yosemite Developer Preview 6