Apple today released OS X 10.9.4 after just a month of testing and a month and a half after the release of OS X 10.9.3. The last 10.9.4 developer beta, build 13E25, was released last week.
The update, which is recommended for all Mavericks users, improves reliability of wake from sleep and fixes an issue that prevented some Macs from automatically connecting to known Wi-Fi networks. Today’s update also includes Safari 7.0.5.