Mac Download Page
The Java Plug-in is not currently available for the Mac.
Apple has announced they will provide a Mac version of the Plug-in:
"The Java Plug-in will allow Apple's customers to use our Java Virtual Machine, Mac OS Runtime for Java (MRJ), to run Java applets in Netscape Navigator," said Steve Naroff, director of Java technologies and core tools, Apple Computer Inc. "Our work with Sun on the Java Plug-in is another indication of Apple's commitment to make Mac OS the best platform for authoring and viewing Internet content." (April 20 1998.)