ELMO-MO-2 on macbook pro wont connect/identify on device

Hey everyone! I work for a school district and the teachers I help out with tech issues are running into problems on their macs using their document cameras called ELMO's. We have started using the newer versions of ELMO that are cloud based. This apparently makes it way easier to set up then before and requires less cords and or software. BUT i have noticed that it works on some macs and not all. For some reason when I plug in the ELMO MO-2 into a device like a Macbook pro it wont get identified as one of options to switch over to that camera. I have tried unplugging all devices that may be conflicting with the camera and only tried the elmo, but i can seem to figure out how to get it to be recognized. the only option i seem to get is the "front facing camera" I am attaching a photo to see what i am talking about. Any feed back would be AMAZING! Thanks!