Macs have been traditionally regarded as being far more secure than PC, and to a large extent this is true. PCs have been far more prone to virus and malware infections over the years, but this has been largely due to the popularity of PCs making them more worthwhile targets rather than Mac being inherently more secure.
In recent years, Macs have started to become more popular than ever and this means that they are prime targets for hacker and malware writers. While in the past it has been safe to say that Mac users do not need virus protection, this is no longer necessarily the case.
Sophos Anti-Virus for Mac Home Edition is a Mac virus protection tool that offers protection for your computer and its data completely free of charge. Suspicious files that are detected can be quarantined or removed automatically so you are always in control of how your computer performs.
The application run unobtrusively in the background, constantly checking the files you open for signs of infection. This not only helps to ensure that your own computer is kept free from malware but also that you don't send infected files to other computers. You also have the option of scheduling regular scans if you would like to check your hard drive more thoroughly.
It is unfortunate that Mac AV software has become necessary, but Sophos' offering quietly gets on and does its job so you can get on with using your Mac.