Ok OS X folks. Looks like Apple finally is releasing a ‘fix/update’ for the MacDefender Trojan.
The update provides a File Quarantine definition for the "OSX.MacDefender.A" malware and Mac OS X 10.6.7 will now automatically update the definitions on a daily basis. The update will also search for and remove MacDefender and its known variants.
The knowledge base article is here
and the actual download is here
Please update your systems.
My previous article is here.