I've just got my remote and have installed the Mac app from the website (0.9.4 Beta).
The app seems to work fine but you cannot resize the window or make it full screen and some of the buttons are really hard to press because they are at the bottom of the screen.
All the options in the View menu are greyed out too, I'm using Mac OS 12.6.3 on a MacBook Pro (Retina, 13-inch, Early 2015)