VIPRE Advanced Security and VIPRE Ultimate Security are compatible with macOS Big Sur 11, macOS Catalina 10.15, macOS Mojave 10.14, macOS High Sierra 10.13, macOS Sierra 10.12, and OS X El Capitan 10.11. For VIPRE to function on Big Sur, Mojave and Catalina, you must allow VIPRE system extension and full disk access. Not all antivirus features are compatible with Mac operating systems, including third-party patching, anti-phishing, anti-spam, webcam and microphone blocker, and firewall protection.