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



From MacRumors:
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 First OS X 10.10.2 Yosemite Beta to Developers