I do not see ManyCam in the list of webCams for GotoMeeting on Mac OS.
I do see it in Skype and other MacOS apps.
I know Google Chrome has an issue on Mac with accessing ManyCam but is there a way to access it via GotoMeeting?
Update: While this would not work on my Macbook Pro (which I use for work) running Mojave 10.14.6, it did work on my Mac Pro running High Sierra 10.13.6. I am wondering if the issue might be the OS version, hardware or third party security software restricting WebCam access via GotoMeeting.