Yes I believe that there are some viruses out there
Nope. By definition a virus can replicate itself without the active (albeit ignorant) cooperation of an end user.
that can attack a Mac
There is malicious software that will erase files and the nature of this software is disguised, typically to look like a jpeg image. But that is a trojan, not a virus. In order to damage your system one is prompted (and must provide) the administrator password *twice*.
and I did think that Symantec had a virus solution for the Mac
If you are naive enough to pay money for something that doesn't yet exist, Symantec is pleased to take your money. But the truth is their is little reason to believe said software will be effective when and if a true OS X virus manifests. Would $10 for software that will prevent both dinosaurs and space aliens from deleting files on your computer be a good deal?
