B.. b.. b.. but, Mac is impervious to any virus!!!!
Read the article. This was a TROJAN... an application that is masquerading as something is it not... or has something added to it. It is not a virus, the definition of which which requires self-replications, self-installation, and self-transmission.
Nor has anyone here claimed that the Mac is "impervious" to a virus... but it is damned difficult to write one for it... and even harder to find a viable vector.