Sonos S2 MacOS app black screen on install

I’d guess there is some software incompatibility, particularly with your video drivers, although that’s a guess. At the least, I’d delete your current versions, and empty the trash. I’d then reboot the Mac, and download a fresh copy from https://support.sonos.com/en-us/downloads and try a new install. If you get to the choice, make sure you choose ‘Connect to existing system’.

I suppose it might also fail if your Mac wasn’t on the same subnet as your speakers, since I think part of the startup process is a poll of existing potential connections (devices).

Note that today, they’ve announced that the desktop apps are going to go away completely at some point, in favor of a new web app, which will be released on May 7. While I use the Mac app frequently, they did strip the admin functions out of it several years ago, and for quite a while now, in order to do any admin functions, you’ve needed to use a mobile controller.