According to a report from The Mac Security Blog, a previously undocumented feature of Apple OS X 10.6 “Snow Leopard” is that it includes a built-in anti-malware scanner. While there are few details on exactly how this works, ZDNet seems to think that it has entered into some type of agreement with a commercial anti-virus company, as they have confirmed that it is not using the open-source ClamAV engine.
Currently the Security page on the Apple website makes no mention of the feature directly, but it does highlight some of the other security measures in place for Snow Leopard, and anti-phishing technologies built into Safari. At the bottom of the page Apple does acknowledge that “since no system can be 100 percent immune from every threat, antivirus software may offer additional protection.”
OS X 10.6 will be shipping this Friday, August 28.