MacOS X 10.9.2アップデートが出たようですが、

About the update
The OS X Mavericks v10.9.2 Update is recommended for all OS X Mavericks users. It improves the stability, compatibility, and security of your Mac. 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
- Includes general improvements to the stability and compatibility of Mail
- 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
- Improves VoiceOver reliability when navigating websites
- Improves compatibility with Gmail Archive mailboxes
- Includes improvements to Gmail labels
- Improves Safari browsing and Software Update installation when using an authenticated web proxy
- Fixes an issue that could cause the Mac App Store to offer updates for apps that are already up to date
- Improves the reliability of diskless NetBoot service in OS X Server
- Fixes braille driver support for specific HandyTech displays
- Resolves an issue when using Safe Boot with some systems
- Improves ExpressCard compatibility for some MacBook Pro 2010 models
- Resolves an issue which prevented printing to printers shared by Windows XP
- Resolves an issue with Keychain that could cause repeated prompts to unlock the Local Items keychain
- Fixes an issue that could prevent certain preference panes from opening in System Preferences
- Fixes an issue that may prevent migration from completing while in Setup Assistant
- Provides a fix for SSL connection verification