1 Free and Open-source Antivirus Apps for macOS (Intel and Apple Silicon)

1- CalmAV

an open-source antivirus engine for detecting trojans, viruses, malware & other malicious threats

ClamAV is an open source (GPLv2) anti-virus toolkit, designed especially for e-mail scanning on mail gateways. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic database updates. The core of the package is an anti-virus engine available in a form of shared library.

Read about CalmAV 's features, license, platforms, and more.