As Mac users, we are greatly protected from some of the perils of the online world. To date, OS X has not suffered from any major Trojan, worm, Spyware, or virus. Vulnerabilities in OS X have been only theoretical exploits that are quickly patched, or are infections that relied on gross user error. I, as do many experts, discourage Mac owners from using an anti-virus program because they are unneeded. We all need to remember that change is the only constant, but by just adjusting one setting, you can make your Mac nearly impervious to any future online attack.

The bottom line is, to stay protected in the future, stop working from your Administrator account.