I'm a technician at an ASP and ...
I saw this about 10 times a week before it hit the headlines. It's not an 'infection' it's just a fake antivirus. Mac Defender (and it's aliases) is the first widespread fake antivirus to hit naive Mac users (i.e. amateur users) compared to 100s if not 1000s of Windows malware programs. The fact is that to remove this malware all you have to do is kill the process and drag it into the Trash Can unlike the Windows malware that disables the real antivirus and firewall, and hooks into the registry. You need an anti spyware utlity and a real antivirus to clear a lot of that - I've even come across some nasty Windows fake AV rootkits too. So Mac OS is still a far more stable and secure OS than Windows will ever be. Jog on, kitties!
Biting the hand that feeds IT
