Uninstall Java: Java is a programming language. Developers use it to create applications on the PC. When people talk about Java being insecure, it is the browser plug-in they are talking about. It opens up a number of holes that allow hackers to steal passwords, credit card numbers and other personal data. In such cases, disable Java in your browser from the browser’s plug-in page. Install malware protection: Viruses, worms, trojans, zombie, spyware, rootkit and adware are the major types of malware. Many factors make a system more vulnerable to malware such as security defects in software, use of the same OS and more. Norton Internet Security 2013 ranks among the top security suites due to its accuracy in detecting malware. It offers features including browser protection, firewall and parental controls, all in an intuitive user interface. If cost is a governing factor, you can download a free antivirus program like AVG Anti-Virus Free. This program blocks unsafe links, downloads & email attachments. Due to the fact that Mac malware does exist, maintaining privacy and keeping data secure are important for any Mac user. The system may face threats from a network like an internet or from someone with direct access to your Mac. A basic step to make your Mac OS secure is to make sure the mac OS software is up-to-date.