The second is a change to how OS X handles Java, in which the system will now keep the Java plug-in disabled until it is needed. This will appear for applets if you do not have Java enabled.

First learn how to use applets to create complex multi-level menus, then consider what you could gain from replacing HTML GET and POST operations with client- and server-side applet implementations.

Apple has released Java for OS X 2013-005, which “delivers improved security, reliability, and compatibility for Java SE 6”. The update is available in the Mac App Store. Of note, the updates ...