Apple seeded the sixth beta of OS X Yosemite 10.10.2 to developers on Wednesday. The new seed drops one week after the release of the fifth beta.
The new beta seed, (build 14C106a) is available to developers via the “Update” tab in the Mac App Store, and via download from the Mac Developer Center.
Apple is continuing to ask developers to focus their testing on Wi-Fi, Mail, and VoiceOver. Many OS X Yosemite users have continued to experience Wi-Fi issues, even after the November 10.10.1 update.