Viruses runs low in the Mac OS realm, that’s a plus, right? That does not mean the Job-lings have got a ton of time to develop extra platforms without the need to defend themselves from attackers. Apple’s sluggishness on this issue have caused some damages from attackers, e.g. allowing attackers to run arbitrary applications or processes on your machine if you visited a webpage hosting a malicious Java applet.

The fix includes the patch to improve the reliability of the security on Java.

Get it by running Software Update or through this link Java for Mac OS X 10.5 (or 10.4) update 4