Apple just seeded a fifth beta of OS X Yosemite 10.10.2 to developers



From MacRumors:

As with previous betas, Apple asks developers to focus testing on Wi-Fi, Mail, and VoiceOver. Many Yosemite users have had some ongoing problems with Wi-Fi since the new OS was first launched in October, and a November 10.10.1 update did not resolve all of the lingering issues.

  Apple Seeds OS X Yosemite 10.10.2 Build 14C99d to Developers