It uses the very popular Clam AntiVirus open source antivirus engine as a back end and has the ability to detect both Windows and Mac threats.ClamXav can be setup up as passive or active: scan only the files you tell it to or your entire hard drive, whichever you prefer you can also choose to activate Sentry to monitor your hard drive and scan new files as they arrive. It uses the very popular … Created by Mark Allan ClamXav is a virus scanner for Mac OS X.