Users of Macs that are still running older OS versions such as Snow Leopard and earlier, as well as those running newer OS versions but have installed Java on their own, are advised to turn off the Java functionality in both their browser and system, thanks to a critical new flaw found in all currently-supported versions of Java, including the latest ones. The bug allows attackers to bypass security features and install malware on Macs or Windows machines that have Java installed and active. All versions from Java 5 on up are affected by the flaw.