Scan for Viruses with Sophos Anti-Virus
anti-virus software for mac os x
NOTE: The initial scan of your computer may take a long time to complete. You can continue to use your computer while the scan is running.
Sophos Anti-Virus On-Demand Scan
Sophos scans files automatically when they are accessed, so it is not necessary to manually run Sophos anti-virus scans on demand. However, if you want to manually scan your computer for viruses, follow these instructions by Sophos (PDF).