ClamXAV is a free and open-source antivirus engine for macOS. It[SQ]s not a full antivirus *application* like you might find on Windows (with a user interface and scheduled scans), but rather the core scanning technology. You need a separate application that uses the ClamAV engine to provide the user interface and features. There are several applications available that integrate with ClamXAV.

Essentially, ClamXAV is the powerful engine that does the actual virus detection, while other apps provide the front-end user experience. It[SQ]s known for being lightweight and relatively resource-efficient.