Apple is reacting to one of the first major Mac targeted viruses, warning customers over the scam and looking to roll out a security update in the next day or so.
The vendor has not traditionally been the target of virus writers, with Microsoft Windows the much more favored platform, but with increasing numbers of Mac owners Apple has become a more lucrative target for criminals.
The current scam tells Mac owners that they are infected with a virus and tells them they need to correct it by downloading a product Mac Defender and at that point are tempted into parting with financial and personal information.
Apple has been quick to warn users about the fake virus and will add a security update to its system software for users to download.
"A recent phishing scam has targeted Mac users by redirecting them from legitimate websites to fake websites which tell them that their computer is infected with a virus. The user is then offered Mac Defender "anti-virus" software to solve the issue," stated the vendor in a user forum.
It pointed out that it was not legitimate software and added that: "In the coming days, Apple will deliver a Mac OS X software update that will automatically find and remove Mac Defender malware and its known variants. The update will also help protect users by providing an explicit warning if they download this malware."