Avast Free Antivirus for Mac scans for viruses and malware in the OS X environment.
Robust scanner: Avast Free Antivirus offers scanning at both a threat and a warning level, meaning you can scan your machine either for immediate threats or for potentially unwanted applications. In addition, Avast allows you to scan individual files via drag and drop rather than making you navigate to each file's location. You can split results to display infections only or to list potentially unwanted items.
Native-friendly design: Avast Free Antivirus looks like a native OS X app. The left Finder-like organization makes it easy to keep track of the app's five main features.
Optional extensions: Avast lets you manage your browser extensions from the main interface. Install or uninstall the Avast extension directly from the program, as opposed to manually navigating each browser's settings menu and disabling the tool. The extension itself is relatively useful for getting a quick glance at a Web site's trustworthiness.
Slow scan times: Our initial full-system scan was long -- over 51 minutes. If you're plan to run the full diagnostic, make sure you can set aside some real time.
Avast Free Antivirus is a solid contender if you're looking to add security to your Mac. Generally, the utility seems respectful of your habits: It's easy to remove extraneous features like browser add-ons and single-file scanners. Though its longer scans could be taxing on older machines, Avast Free Antivirus is a worthy and minimally invasive addition to your system.