It's true - Mac viruses really do exist, although fewer viruses target the Mac OS compared to Windows. In addition, there are cross-platform threats that can impact Mac users. Though the risk of cross-platform threats is relatively small, it's a risk that is on the increase as attackers move to Java and other third-party software exploits. Fortunately, there are several excellent Mac antivirus offerings - and some are even free.
Sophos Anti-Virus for Mac Home Edition offers business-grade protection free for home use. And the protection literally is business-grade - the free version is based on the same Mac virus scanner Sophos uses in their Endpoint Security line. Best of all, Sophos Anti-Virus for Mac Home Edition detects both Mac and Windows malware. For example, if you use Parallels with a Windows virtual machine on your Mac, files in shared folders on your Mac will be scanned for both types of threats.
Intego focuses soley on Mac security. According to antivirus.about.com readers, this dedicated focus is a very good thing. 59% of voters in the 2011 Antivirus Readers' Choice Awards voted Intego VirusBarrier as the Best Mac Antivirus.
PC Tools iAntivirus offers free Mac antivirus software to home/home office users and for a nominal fee to corporate Macintosh users. iAntivirus guards against Mac only malware - a focus that has its pros and cons. Check this review to decide whether PC Tools iAntivirus is the right Mac antivirus software for your environment.
BitDefender has a good track record for detecting and preventing viruses and other forms of malware. BitDefender Antivirus for Mac will help keep your Macintosh system free from Mac malware and will help prevent the transfer of Windows-targeting malware as well.
Malware poses particular risk to the enterprise - left undetected, keyloggers and backdoors can compromise sensitive corporate or network assets. Thus, visibility into what's happening on the enterprise network is a key component of security solutions. Unfortuntely, Macs can be difficult to manage and may pose a blind spot in mixed environments. Here's how McAfee VirusScan for Mac confronts that problem.
ClamXav is free Mac antivirus software based on the open source ClamAV engine. ClamXav supports Mac OS X 10.5 and 10.4, as well as providing limited support for Mac OS X versions 10.3 and 10.2. Multiple languages are also supported. Unfortunately, its support for virus detection may not be nearly as broad.
MacScan from SecureMac is designed to guard against spyware-related threats targeting Mac users. While its scope is limited, such focused protection isn't necessarily a bad thing. This look at SecureMac's approach should help you decide whether MacScan is right for you.
Norton AntiVirus 11.0 for Mac isn't the most inspired antivirus software for Macs, but does it get the job done? The answer to that question depends on what you're trying to protect. And that answer dictates whether Norton AntiVirus 11.0 for Mac will be the right antivirus scanner for you.
Norton AntiVirus Dual Protection for Mac is designed for Mac users who routinely dual boot into Windows or run Windows in a virtual environmenton their Intel-based Mac. How well it works depends on what it is you're trying to protect.
Norton Internet Security 3.0 for Macintosh supports the PowerPC G3/G4/G5 processor only, running Mac OS X versions 10.1.5 through 10.3.9 only. At about $70 USD, Norton Internet Security 3.0 for Macintosh may be a bit pricey for such older versions. On the flip side, there aren't too many Mac antivirus scanners that support those older versions, thus Norton Internet Security 3.0 for Macintosh may be your best bet.