One of the great advantages they possess all Mac users is the absence of virus, a problem that plagues each and every one of the users of other Operating Systems, being shelf Microsoft the most vulnerable to attack by hackers.

The computers created by Apple and its corresponding software have historically been free of threats and antivirus, because they never have created specialized programs to destroy harmful work products of the apple business.
If you're a novice Mac user, or you change your thinking towards this operating system keep in mind that your computer security is guaranteed and you do not need any outside help, like special antivirus or anything like that, to support the "health" of the computer against a possible threat.
Therefore, never pay attention to those who spin the web offering or recommending any application to improve the protection of your Mac, because they need it. Also, if tomorrow there are any circulating viruses or threat against Software the Company will be the first to inform and to devise a quick solution to end this problem.
Anyway, it never hurts to be cautious, even though we are users of any software platform. Be careful where downloads applications or do not trust attachments from anyone, unless someone they know. The security of your Mac is assured, but it's always good to have this common sense and self-preservation.