Anyway, about the whole virus thing ... much has been written here about it, but in a nutshell you don't need virus protection for the Mac because there aren't any Mac viruses. We're not completely free of other types of malware (rassumfrackinJAVAmuttermutterFLASHrackinfrackin), but Apple already has an anti-malware called XProtect in place on your system that it updates "silently" as needed, the Mac operates as "stealth" by default, and there are built-in security measures you can take (such as only allowing approved developers' stuff on your machine, not allowing others access to your personal account, etc). For the most part Mac users really don't have to think about this stuff much.
Mostly common sense rules the day. Avoid pirated software (a major source of Mac malware), suspicious OMG YR MAC IS INFECTED ads, the evil and widely-advertised MacKeeper crapware, "view porn with this special codec" and other such trickware. Never supply your admin password to downloads unless you are sure you know what you are getting. Windows viruses (sent in an email, for example) can't harm your machine, though of course if you install Windows on your Mac the Windows install will need the same level of anti-virus/anti-malware stuff you would normally put on a PC.
Yeah it's nice not to have to deal with this stuff much. Welcome to Macintosh.