Combo Cleaner is an antivirus and system optimizer created by a company called RCS LT. This application runs on Mac computers and works with all recent Mac operating systems, including Yosemite, El Capitan, and Sierra. This application takes a different approach as compared to traditional antivirus suites. As well as an antivirus function, Combo Cleaner includes a disk cleaner, big files finder, duplicate files finder, privacy scanner, and application uninstaller. This app can be used to clean computers of security threats and free up significant disk space cluttered by redundant files. Although Mac computers are thought to be more secure than Windows systems, a reliable antivirus solution is paramount.