DownloadCheck for Mac

From IconFactory:

In response to the threat of a new Mac virus that is said to completely wipe out one's Home directory, DownloadCheck checks for applications in user's Downloads folder. Although its highly unlikely Mac users will find a MP3 or other document type masquerading as an application. Most transport mechanisms on the Internet will not preserve the resource fork of the file being downloaded. Without the resource fork, the MP3Concept Trojan, and others like it, will not work. DownloadCheck is released as a deterrent for anyone who might consider writing an exploit of this type. We hope that we'll never need to use it.