You may not believe it but there are viruses on Mac too, albeit lesser than Windows but still some viruses do target the Mac Operating system. What is more there can cross platform threats that can affect users of Mac. Though still not such a big threat it is seems to be on the rise due to the move of the attackers to Java and many 3rd Party software exploits. Here are some free antivirus protection options for Mac that are free.
This one offers free protection to home users that is at a business grade. Sophos Anti-Virus for the Mac Home version can detect Windows and Mac malware. If you are using parallels with Windows machine virtually on your Mac device, the contents of all folders that are shared will be thoroughly scanned for threats of both types.
Intego VirusBarrier — Mac Antivirus Software:
This one concentrates solely on security for Mac. This is a really good thing according to some relevant surveys as users feel this is what is needed.
PC Tools iAntivirus — Free Mac Antivirus Software:
Provides free antivirus software for protection of personal and official users. For company Macintosh usage a small fee is charged. iAntivirus protects against Malware for Mac only which has its own advantages and disadvantages. You can read online reviews to know whether this is the way for you to go or not.
BitDefender comes with an excellent track record for finding and stopping malware, viruses and other spyware. This one will work diligently to protect your Macintosh system clean and free from Mac malware and will also stop the movement of malware that targets Windows from entering your system.
Malware can really do a lot of harm if you do not find it and get rid of it. Backdoors and Keyloggers can really harm important corporate information or make a mess of assets on the network. A view of what is going on in the network of the enterprise is an important part of solutions for security related matters. Since Macs can be a bit tough to administer leaving people who manage it feeling helpless, McAfee VirusScan can help manage and fix this issue.
ClamXav — Free Mac Antivirus Software:
Comes free and is a free antivirus program for Mac that is derived from the open source ClamAV engine. This one supports Mac operating system X 10.4 & 10.5 and also provides some support for Mac operating system X versions 10.2 & 10.3. It also supports multiple languages though unfortunately the virus detection support is not that broad.
MacScan v2.6 — Mac Antispyware from SecureMac:
This one is made to defend against threats that spyware related focusing on Mac users. With limited scope it still is really quite good.
May not be the most inspiring antivirus software for Mac but can still do very well. Actually the question of whether it suits or not depends on your specific needs.
This one has been made for users of Mac who matter of course go dual and use or run windows in a virtual circumstance.
This one supports and works only on PowerPC G3/G4/G5 processor and only Mac OS X versions 10.3.9 & 10.1.4. It could turn out to be expensive for earlier versions.
Go through this list to pick the one that will work for you based on usage, budget and usability. The information is here, make the most of it.