Well it looks like malware has finally found it’s way onto the OSX platform. I saw (and heard about) a few instances of the Mac Defender malware showing up on a few MacBooks last week. Apple has been quick to respond with a new security update that incorporates a new anti-malware feature into the operating system.
General tab of Security settings.
The “safe downloads” list feature is updated automatically each day following installation of Security Update 2011-003. This update can be installed using the Software Update feature.