QuickStart Guide
- Download the ClamXav disk image from ClamXav.com
- Drag ClamXav.app from the disk image into your Applications folder (or wherever you like)
- Eject the ClamXav disk image
- Double click ClamXav.app At this point, you may or may not be prompted to install or update the ClamAV scanning engine (See Building Your Own Engine if you want to build ClamAV yourself)
- If so, click "Install" and follow the onscreen instructions. Once the installer has finished, double click ClamXav.app again
When you launch ClamXav, you'll be presented with the following window:
Make sure you're connected to the internet and click the "Update virus definitions" button on the main window. ClamXav will attempt to connect to the ClamAV website to download and install new virus definitions. If you connect to the web through a proxy server, please see the preferences section for instructions on how to set this up first.
Click "Choose what to scan..." and choose a file, folder or a combination of files and folders by holding down the Command key. If you wish to scan multiple items in separate folders, click the view button 
to change it to list view, press the disclosure triangle beside each folder you wish to open, and then hold the Command key as before whilst making your selection. To access hidden folders, type the forward slash character on your keyboard and then type the full path to your desired folder.
Click the "Start Scan" button and wait for the results.
Alternatively, drag and drop a selection of files/folders onto the main ClamXav window, Finder icon or Dock icon and scanning will start immediately.
While ClamXav is scanning your selection, you'll see the name of each file fly past in the "Currently Checking" section of the main window.
Should any infected files be found, they'll appear in the "Report" region of the main window. What you do with them after that is entirely up to you!
You can stop a scan/update safely at any point.
Various settings and actions may be refined by altering the preferences.