I am setting up a three camera system with PTZOptics NDI cameras. I've done this many times on a PC, but first time on a Mac. It is a MacBook Pro with I9 2.3Ghz processor. Big Sur 11.6. OBS 27.0.1 Cameras are visible in NDI Video Monitor, but when I go to add them as an NDI source, they are not showing up in the drop down menu. Has anyone faced this and overcame? Help needed.