Today at the Q&A I was asked about antivirus software. The Link below is an excellent article taken from the Apple Support Page. It is a bit long and at times technical, but it does a really good job explaining why you don't need any protection software on a Mac. John Galt is one of the highest rated sources on the Apple sight. Bottom line is that Mac OS is fundamentally different from Windows and was designed to be secure from Viruses. We all need to remain vigilant and exercise safe practices, but with common sense steps the Mac is very safe and secure.