Apple has released an International English Mac OS update, Mac OS Runtime for Java (MRJ), version 2.2.3.

The update is certified for use with Oracle applications, and offers "substantial" performance improvements and bug fixes, says Apple.

MRJ is Apple's implementation of Sun's Java Virtual Machine (JVM). It provides the runtime software needed for Java applets and applications. It also includes the Apple Applet Runner, a utility that can run applets without a browser.

The update also introduces JAR (Java Archive) caching. If a Java applet uses many - or very large - JARS, loading files to make applets work can take some time. MRJ 2.2.3 saves copies of JAR files to the Mac's hard drive. MRJ then checks cached JARs to speed up the loading time for applets.

Memory problems have been addressed, and the improved Apple Applet Runner is capable of loading and running applets with 2byte filenames, including Japanese and Chinese filenames.

The update is available for download from Apple's Software Download Web site.