Canon 5D MkII not detecting in iMovie and Photo Booth
Background:
Until a few weeks ago we were using a Panasonic N28 Camcorder to take photos via Photo Booth and record videos via Image Capture. We had it connected using Firewire and maybe we also had USB too and it was able to shoot videos via iMovie'11 too. We now replaced this model with a Canon 5D MkII.
Issue:
Our Canon 5D MkII replaced our camcorder and it's connected via usb to our MAC running Mountain Lion and iMovie'11 with the latest update, yet it is not recognised by iMovie & Photobooth. It it unable to be selected and used instead of the iSight camera. It works fine in Image Capture so there is no hardware issues with the Canon 5D MkII. I can import recorded movies into iMovie'11 also.
What is the issue? Is there anything I need to download from Apple? Can my Canon 5D MkII be used in place of my Apple iSight camera?
Please help if you can.
iPhone 4S, iOS 5.0.1, Mac OSX 10.6.8 & iTunes 10