Mark Allan has released ClamXav 2.7.2, which now enables you to start and stop the Sentry file monitor from the ClamXav menu. The free virus scanner fixes a scheduler-related crash that occurred in Mac OS X 10.6 Snow Leopard, 10.7 Lion, and 10.8 Mountain Lion, and it fixes an issue that caused the animated Dock icon to use an “inordinate amount” of the Mac’s processor. Sentry now supports Fast User Switching, displays the correct date and time for your time zone in the log, improves stability for Snow Leopard, and properly honors exclusion settings and scan email settings in ClamXav’s preferences. Note that the Mac App Store edition remains stuck at version 2.6.4. (Free, 21 MB, release notes, 10.6+)
Would love to see a review of Mac Malware scanners from a trusted author. I'm getting more and more inquiries about this growing threat.
We mention ClamXav in large part because it's free, so someone who feels the need to have such software doesn't have to pay for it. And that's because, overall, we don't recommend using any antivirus software. See http://tidbits.com/article/13476