how to use clamav on macOS Mojave

1. installation

   I guess you have installed macports.

   sudo port install clamav
   

2. configuration

   cd /opt/local/etc
   sudo mv freshclam.conf.sample freshclam.conf
   sed -i ".bak" 's/Example//g' freshclam.conf
   sed -i "" 's/#DatabaseDirectory/DatabaseDirectory/g' freshclam.conf
   sudo mkdir -p /var/lib/clamav
   sudo chown -R clamav /var/lib/clamav/
   

3. update and scan

   sudo freshclam
   cd /
   sudo clamscan -r