Ok re the 8600 I thought you had it working on the Mac? SDRUNO and HF+Discovery work great on Catalina.
Yes I installed from the SdrGlut-957-Install.msi on Win10.
Also have the icr8600_usb_iq package installed even uninstalled and reinstalled it to make sure after it wasn't seeing the 8600.
The 8600 is on the latest firmware.
Rebooted several times as with anything Windows !
clicking on any of the SDRGlut buttons in the initial screen does nothing and can't even move the little window.
The only way to quit is close the terminal window.
The terminal shows the soapy drivers are loading but thats all. The i8600 one is there..
I attached an image not sure that helps?
Cliff