Java for Mac OS X 10.6 Update 13 delivers improved security, reliability, and compatibility by updating Java SE 6 to 1.6.0_41.

On systems that have not already installed Java for Mac OS X 10.6 update 9 or later, this update will configure web browsers to not automatically run Java applets. Java applets may be re-enabled by clicking the region labeled "Inactive plug-in" on a web page. If no applets have been run for an extended period of time, the Java web plug-in will deactivate.

Please quit any web browsers and Java applications before installing this update.

"Apple has identified malware which infected a limited number of Mac systems through a vulnerability in the Java plug-in for browsers. The malware was employed in an attack against Apple and other companies, and was spread through a website for software developers," the statement said.

"We identified a small number of systems within Apple that were infected and isolated them from our network. There is no evidence that any data left Apple," it continued.