Avast Free Antivirus for Mac is Avast's answer to concerns about how to browse safely. The application is packaged with a brand-new, easy-to-understand graphical user interface, with access to all features available at single click. The application's onscreen tools are well-organized, and its live graphics enhance the feeling of safety -- you can see that the antivirus software doesn't sleep and is always working to protect you from any viruses circulating on the Web. Avast's free software provides three shields to protect your computer: a file system shield, an e-mail shield, and a Web shield. With all three representing a door to your computer, Avast does a great job of watching these entrances.