Give your PC a proper cleanup. Running out of disk space? Avast Cleanup scans your PC from top to bottom to remove gigabytes worth of leftover junk files from more than 200 applications, browsers, and even Windows. Avast Antivirus for Mac is a “free” software program that protects your Mac from viruses, malware, spyware, and ransomware. The free version doesn’t do much more than allow you to scan for malware that has already made its way into your system. Feb 24, 2017 Avast Pro Antivirus 2017 offers the same wealth of features as its free edition, and not a lot more. It's an excellent product, but for most people the free version will suffice. To enhance security and optimize machine performance, Mac users may download a trial or purchase 2018 Avast Security Pro and Cleanup Pro for Mac, available at $59.99 each. Reviewer’s licenses are available.