It is a common trope that OSX doesn't need anti-virus because everyone targets windows. That is maybe comforting to some but I think it's pretty naive. It would be better to have a system on your machine to tell you about viruses, trojan horses, malware, or spying. I have decided to employ a free open source scanner called clamAV https://www.clamav.net/. I don't really know if it has any good features for Mac scanning but thought it could be fun to install
ClamAV is the top choice for linux based OSs being free and open source (GPL) virus scanner.
To install we can use homebrew
$ brew install clamavThen there is s config file to setup. This is located in /usr/local/etc/clamav/freshclam.conf
To setup, edit this file and delete the line that says "Example" and then uncheck the desired settings. I would chose to enable logging to /var/log/clamav.log and also database directories in /var/lib/clamav
Then run the "freshclam" program
$ freshclamThis will download the virus scanner database (main) and daily scanning updates
Then you can run clamscan on a given directory (recursively, only print infected files)
$ clamscan -ri ~/Or add this to a cronjob
$ crontab -
@hourly clamscan -ri ~/ | mail -v -s "clamscan results" your.email@gmail.com >/dev/null 2>&1