System performance basically refers to whether if it lags your Mac when you run the antivirus program in the background. Not all antivirus software have effective threat and malware detection. Threats and Malware Detection Effectiveness Most antivirus software runs on the latest OS, some are available on earlier OS. Note that not all antivirus software will be compatible with your MacOS. Here are the main criteria you should look out for. As mentioned before, Mac already has a strong system defense, naturally the criteria you are looking for in an antivirus software would differ from what Windows users are looking for.
