Doesn’t look like it works on Big Sur (11.x) with my Intel Macbook Air, but I’m a first time user so I’m not sure what is supposed to happen after you open the app.
I have MacOS 11.1 (beta)… although 11.0 has been released to the public. Click on the app, you can see it in the menubar, but there are no windows and no menu items that would open windows or do anything.
There are no windows or a seperate menu bar on MacOS (X).
The only thing you can see is the xlr-connector-icon on the right side of the menu bar.
After you have started the soundjack controller you need to enter the website and there the stage (after login).
Then you can set the parameters from there.