John Gruber’s delivered a list of previous claims that the Mac is about to succumb to malware real soon now under the title of “Wolf!”
The analogy John’s making is that the pundits should all remember the tale of the boy who cried wolf. But, as my friend Graham pointed out, John’s missing something: at the end of the tale, on the last occasion, there actually was a wolf.
There is no such thing as a perfectly secure operating system. Sooner or later, there will be a wolf.

