"(OS X 10.10.2) This update includes the following improvements:
- Resolves an issue that may cause Wi-Fi to disconnect
- Resolves an issue that may cause web pages to load slowly
- Fixes an issue that caused Spotlight to load remote email content when the preference was disabled in Mail
- Improves audio and video sync when using Bluetooth headphones
- Adds the ability to browse iCloud Drive in Time Machine
- Improves VoiceOver speech performance
- Resolves issue that causes VoiceOver to echo characters when entering text on a web page
- Addresses an issue that may cause the input method to switch languages unexpectedly
- Improves stability and security in Safari

For enterprise customers, this update:
- Improves performance for browsing DFS shares in the Finder
- Fixes an issue where certain Calendar invitations could be displayed at the incorrect time
- Fixes an issue for Microsoft Exchange accounts where the organizer of a meeting might not be notified when someone accepts an invitation using Calendar
- Addresses an issue where Safari could continually prompt for credentials when accessing a site protected by NTLM authentication
- Adds the ability to set "Out of Office" reply dates for Microsoft Exchange accounts in Mail

Updater Download Pages
• OS X 10.10.2 Update (delta) (554.3 MB)
• OS X Yosemite 10.10.2 Combo Update (840.3 MB)
  (FYI: A post on Wednesday (28th) says the 10.10.2 Combo Updater has been revised with a change to the installer script and Apple download page page date has been changed to Jan. 28th. There were early reports of the 10.10.2 Combo Updater not applying over OS X 10.10.1 installs using the original download.)
  
  
• Security Update 2015-001 Mountain Lion
• Security Update 2015-001 Mavericks

Info on security fixes in today's Apple doc listing are below, including Safari 8.0.3, 7.1.3, and 6.2.3. (Software Update also showed Remote Desktop Client Update 3.8.2 on the Mini running OS X 10.9.5 and linked to a doc about Remote Desktop Admin 3.8.)

I'm not running Yosemite yet but check for feedback in Apple's OS X yosemite forum. (Some early posts there on OS X 10.10.2 Wifi and Thunderbolt external drive problems.)

A reader (thanks Rob) sent a FYI/warning users of the Piker-Alpha boot.efi modification (for unsupported Macs) that OS X 10.10.2 overwrites boot.efi so before updating users should have applied the patch mentioned in this previous MR thread post.
  

• About the security content of OS X Yosemite v10.10.2 and Security Update 2015-001
• About the security content of Safari 8.0.3, Safari 7.1.3, and Safari 6.2.3

Apple also posted a doc on Adobe Flash Player updates available for OS X on January 27, 2015. (Related to Adobe Security Advisory/Updates for Flash Player here and here.)
  

• Apple Remote Desktop 3.8 (app store link)
  - Support for OS X Yosemite including updated interface
  - Enhancements for sending files using Copy Items
  - Fixes for remotely viewing clients in full screen mode
  - Multi-observe improvements for viewing large number of clients
  
  
• iOS 8.1.3 (release notes)
  Includes bug fixes, increased stability and performance improvements:
  - Reduces the amount of storage required to perform a software update
  - Addresses an issue that caused Spotlight to stop displaying app results
  - Fixes an issue which prevented multitasking gestures from working on iPad
  - Adds new configuration options for education standardized testing
  - Fix issue that prevented some users from entering password for Messages & FaceTime
  
• About the security content of iOS 8.1.3
  
  
• Apple TV Software Update 7.0.3 (Apple TV 3rd generation only)
  ("Includes general performance and stability improvements.")
• About the security content of Apple TV 7.0.3
  
  Apple Support Article Update:
  
• iTunes: Troubleshooting AirPlay and AirPlay Mirroring