Importing to the camera would suggest you are adding something onto the camera, not sending something from the camera to the computer. That would be exporting.
Sounds to me like your camera is trying to import a video file and the Mac is feeding it your web cam video.
Use your software program to pull the video off the camera onto the Mac.
Thanks, Viper -- I found out that my fire-wire was faulty... so all is now well! Thanks!