Update - I haven't yet heard from HeliconSoft. I spent 2 hours with Apple support, and we determined that my crash problem related to a Creative Cloud extension file. But on the Remote software - nothing works.

I did learn that I can use Lightroom's tethered camera feature to trigger the camera on ...

I have an imac, High Sierra, on which I run Helicon remote. It connects to both the wemacro rail motor and to my Canon camera.

I now have a new mac mini, running Big Sur. On this machine, the same software connects to the camera, but not to the rail motor. I know that the connection is there ...