Bitdefender Virus Scanner finds Mac malware as well as Windows viruses with ease.
It detects the latest MAC.OSX.Trojan.Flashback.

Scan running apps, scan critical locations, scan a specific location or scan the entire system, the award-winning Bitdefender engines will find that malware. For free!
Don't put your friends and family at risk by unknowingly passing malware along.

Features:
- sports full award-winning Bitdefender engines;
- finds Mac malware as well as Windows viruses and other threats etc.;
- always updated before a scan to the latest virus signatures. Bitdefender virus signatures get updated every hour;
- quick scan! Fast scan system areas that are prone to infections;
- searches for malware even in archives, various other file types. i.e. pdf, pkg, zip, rar etc.;
- Growl notifications;

also:
- easy-to-use interface;
- straight-forward security status and recommendations;
- quarantines dangerous files;
- deep system scan;
- scans running applications and daemons;
- scans a custom location. tip: try scanning by drag and drop;
- exclude files and folders from scan (i.e. Time Machine backups, network shares etc.);