(Which of course defeats the ability to track your subject and keep the face in focus.) So then - Screenflow records through the Magewell okay. Utterly unusable! You can ONLY get rid of the box by physically moving the Auto-Focus button on the Canon to Manual Focus. BUT Screenflow, for some reason, keeps filming that moving white box.

can be turned off in EOS Utility so filming goes ahead whilst Auto-focus is operating. The white box that follows your face around as you're moving?. It seems to work with its own EOS Utility BUT there's a problem using it with the Magewell in Screenflow. So - in other words - use Auto-Focus while filming movies. I have a Canon 7D - which I thought had the ability to do Face Recognition Auto Focus WHILST in MOVIE mode. Regrettably my experience with it is less than promising. So upon your recommendation I bought the Magewell HDMI to USB3. We can't promise they will continue to work since they aren't officially supported but those have been what users have reported. That would be devices from Magewell, Epiphan, Inogeni. 'ScreenFlow doesn't officially support video capture devices but users have reported that HDMI to USB3 devices that are driverless do work. Craig - re your previous advice concerning HDMI>USB devices.