Since my last review, the macOS product has undergone a redesign that makes it look a lot more like the Windows version. Avira Free Antivirus for Mac doesn't cost a penny, and it earns good scores in tests by the independent labs. You need antivirus protection on your macOS devices, though you don’t necessarily have to pay for it. Macs get hit by malware, even ransomware. Yes, macOS has better built-in defenses and fewer users overall, but that also means that a malware attack doesn’t have as much competition. Windows and Android are the most popular targets for malware coders, but that doesn’t mean macOS is immune. Best Malware Removal and Protection Software.