Disabling Java on Systems Running Mac OS
To secure computers running a version of the Mac OS prior to Mac OS X 10.6, Java must be disabled at the browser level. Follow the steps below to disable Java in any browser that you use on your system.
Select "Preferences" from the Safari menu at the top left of the screen and go to the "Security" tab.
Uncheck "Enable Java".
Select "Add-ons" from the Tools menu at the top of the screen and go to the "Plugins" tab.
Disable all Java Plugins listed.
Type "chrome://plugins" in Chrome's address bar.
Click the "disable" link below any java plugin listed.