OS X 10.9.2

Mac OS X 10.9.2 was released on February 25, 2014.

This update:
 * Adds the ability to make and receive FaceTime audio calls
 * Adds call waiting support for FaceTime audio and video calls
 * Adds the ability to block incoming iMessages from individual senders
 * Improves the accuracy of unread counts in Mail
 * Resolves an issue that prevented Mail from receiving new messages from certain providers
 * Improves AutoFill compatibility in Safari
 * Fixes an issue that may cause audio distortion on certain Macs
 * Improves reliability when connecting to a file server using SMB2
 * Fixes an issue that may cause VPN connections to disconnect
 * Improves VoiceOver navigation in Mail and Finder
 * Provides a fix for SSL connection verification

External References
Apple: OS X Mavericks 10.9.2 Update