There are some updates to watch for. Even reaching the mainstream press, the Java bug can affect systems running Snow Leopard (10.6) or later, making the Mac vulnerable to malware that may be encountered on a dodgy web page. It does not affect systems running 10.5 or older. To protect yourself, open Software Update and run any Security Updates and any Java Updates it offers.

Then open Safari’s Preferences, Security button, and uncheck the box for Enable Java. You probably won’t even miss it as legitimate sites that use it are dwindling in number. Should you visit a trusted site and it wants to use Java, just go back to Preferences, enable Java, then reload the page. Disable it when you are done.