An extract of a nice read at ZDNet:I can tell you for a fact, many, many people are falling for this attack. Our call volume here at AppleCare is 4-5x higher than normal and [the overwhelming majority] of our calls are about this Mac Defender and its aliases. Many frustrated Mac users think their Mac is impervious to viruses and think this is a real warning from Apple. I really wish I could say not many people will fall for this, but in this last week, we have had nothing but Mac Defender and similar calls.