Apple today seeded the second beta of OS X 10.10.2 Yosemite to developers



From MacRumors:

The new beta, build 14C78c, is available through the Software Update mechanism in the Mac App Store and should be available in the Mac Dev Center soon. Like OS X 10.10.1, as a minor update, OS X 10.10.2 is likely to bring bug fixes and performance improvements to the operating system. OS X 10.10.1 introduced several reliability enhancements, including improvements to Wi-Fi, but many users have still been reporting issues with Wi-Fi stability in Yosemite.

  Apple Seeds Second OS X 10.10.2 Yosemite Beta to Developers