macOS introduce a camera as webcam

[Syonidism]

Hi i was wondering what i needed to do to introduce my dslr to the mac as a webcam? prefrably a canpn 450D

or if i had another alternative so i could use it as a webcam device?..

ive made it so i can record videos and movies by installing

qt framework and eos_movreq however i would like to make applications like photobooth see it as a webcam so i can use it on ichat, amsn, web based flash webcam comments. etc.

thanks in advance.