Notice I said malware, not virus. I understand that there are no known viruses for OS X, but there is malware. I've been a Mac owner since 2004. I have two separate user accounts on my Mac, and Admin account and a Standard account that I use. I have always used Intego Virusbarrier. It has always worked nicely. No problems. And I know as a Mac owner, I really don't need Virusbarrier, but as someone who cares enough not to want to pass Windows viruses/trojans on to friends and family who run Windows, I use it. I have read through these forums and I see that using Sophos is not recommended because it uses root privileges. My questions are: Do all the Antivirus (malware detection) software use root privileges except ClamXav and the stand alone version of Virusbarrier? Does Intego Virusbarrier X6 or eset Cybersecurity run at the root level? I was trying to decide if I should stay with Intego or try out eset Cybersecurity for Mac. I know that the PC version is really good. I didn't know if anyone had any experience with eset on the Mac.