Antivirus engine last updated in 2009 (read: outdated). IAntivirus - Protects against 116 threats specified for Mac OS X. Protects against, both Mac and Windows, 211,1053 threats. Sophos Anti-Virus for Mac Home Edition - New in 2010. No background protection by default (need to enable it). Based on ClamAV open source antivirus engine. Read on for the free antivirus for Mac OS X Snow Leopard.ĬlamXav 2.0 Beta - One of the oldest and free Mac antivirus. Long answer: read the quote I found on ClamXav website:įirstly, there’s no guarantee that we Mac users will continue to enjoy the status quo, but more importantly, the majority of the computing world use machines running MS Windows, for which an enormous quantity of viruses exist, so we must be vigilant in checking the files we pass on to our friends and colleagues etc.