So I have a mac and i ma wondering if there is a way I can tether it to my nikon d300s throughout the usb port in my camera. The main thing i want to be able to do is use it to shoot video. So i have found one on the app store (sofortbild) but it could not shoot video... I know canons have the dos control on the disk and i looked on my disk that came w/ the camera and there wasn't anything so if anyone can help me out that would be great