Hi there,
I am Alberto from [login to view URL] We have extensive experience in device driver development for windows, linux and osx. In fact, we have developed several camera drivers in the past that are now in commercial use (check our webpage, [login to view URL] for our references).
I think you might be facing some problems with the built-in OS X driver, some "quirks" with UVC compliance are know to cause troubles with them. We can assess the problem and figure it out.
Let me know if you are interestedd and let's discuss further.
Regards,
Alb