Apple has expanded a download warning feature in Mac OS X 10.5 to create rudimentary anti-malware detection in the new Snow Leopard operating system due out Friday, sources have confirmed.

Out of the box, Snow Leopard will be able to detect only two Trojan horses, although Apple will be able to push other signatures to users through the Mac operating system's Software Update service, those sources said.

The confirmation came after reports that Snow Leopard had taken its predecessor's File Quarantine feature a step further, and actually scans files downloaded by Safari, Mail or iChat for malicious code. Where Leopard only warned users that a file had been obtained from the Internet -- and thus was potentially dangerous -- Snow Leopard scans files for possible malware.

More: http://computerworld.com/s/article/9137176/