If you have a Mac running OS X Mavericks, update 10.9.2 has been pushed to the Mac App Store, which adds several new features, fixes a variety of bugs, and namely fixes the SSL/TLS vulnerability. On the feature side, 10.9.2 adds the ability to initiate and receive FaceTime audio calls, while also blocking individual senders on iMessage. Mail is named as having received a slew of bug fixes: compatibility improvements for Gmail's Archive folder and labels are listed, as well as resolutions for a bug that prevented Mail from receiving messages from "certain providers." The update will require a restart for installation.
- More information about 10.9.2 can be found here: http://support.apple.com/kb/HT6114
- Security details about 10.9.2 can be found here: http://support.apple.com/kb/HT6150
- Download link for the combo update (for advanced users installing the update outside of the Mac App Store): http://support.apple.com/kb/DL1726