This comes from Yahoo News, but is covered all over.
"The computer security industry buzzed Thursday with warnings that more than a half-million Macintosh computers may have been infected with a virus targeting Apple machines.
The infections, spotted "in the wild" by Finland-based computer security firm F-Secure and then quantified by Russian anti-virus program vendor Dr. Web, come as hackers increasingly take aim at Apple computers.
"All the stuff the bad guys have learned for doing attacks in the PC world is now starting to transition to the Mac world," McAfee Labs director of threat intelligence Dave Marcus told AFP."