ClamXav is a trusted and highly recommended anti-virus and malware scanner for Mac OS X with the ability to detect both Mac and Windows threats.
ClamXav puts you in control - it can be set up up to scan either the specific files you tell it to, or your entire hard drive, whichever you prefer. If you like, you can also choose to activate Sentry to monitor your computer and scan any new files as they arrive. Automate scans and database updates to match your schedule.
Running silently in the background, ClamXav Sentry is so lightweight that you'll barely even notice it's running.
Let ClamXav work for you, and with you. It will give you peace of mind, and it won't get in your way.