If your camera is supported, and you followed all of our setup instructions, and Dragonframe can’t seem to talk to it… it may be a permission issue. There was probably a point, when you first ran Dragonframe on macOS Catalina, that it asked if Dragonframe could access Photos… and you said ‘no’.
Quit Dragonframe and turn off your camera.
Open a Terminal (in Applications : Utilities) and run the following command:
tccutil reset All com.dzed.dragonframe4
The run Dragonframe, and answer ‘Yes’ to the permissions questions.
If that doesn’t work, please try the 4.2 development build.