Apple today seeded a fourth beta of OS X 10.10.2 Yosemite to developers, nearly four weeks after the previous beta release



From MacRumors:

The interval between seeds was slightly longer than usual for recent updates, presumably due to the holiday pause. The new beta, build 14C94b, is available through the Software Update mechanism in the Mac App Store and through the Mac Dev Center. Apple continues to ask developers to focus their testing on Wi-Fi, Mail, and VoiceOver.

  Apple Seeds OS X Yosemite 10.10.2 Build 14C94b to Developers