Java for OS X 2013-004 delivers improved security, reliability, and compatibility by updating Java SE 6 to 1.6.0_51.There are separate updates available for both OS X Snow Leopard and OS X Lion/Mountain Lion which can be downloaded through the Mac App Store or from Apple's software download site.
On systems that have not already installed Java for OS X 2012-006, this update disables the Java SE 6 applet plug-in. To use applets on a web page, click on the region labeled "Missing plug-in" to download the latest version of the Java applet plug-in from Oracle.
Please quit any web browsers and Java applications before installing this update.
See http://support.apple.com/kb/HT5717 for more details about this update.
See http://support.apple.com/kb/HT1222 for information about the security content of this update.
Apple's annual developer conference in San Francisco.