I wasn't expected MacOS X 9.0 support to be completely dropped with an seemingly insignificant incremental update (it was the update to 8.1.1 that killed it for me I think), and I think that a warning that my controller will become essentially bricked should be displayed before updating. Is there any possible way to downgrade my system's software from where it is currently (8.4) to 8.0 or below? I don't have any Sonos ONEs so that's not a problem. Or, if that's not feasible, are there any third-party desktop apps for controlling my system? It was such a nice convenience for me to be able to control my desk speaker from my computer.
Best answer by Ryan S
There are critical updates in both OS X and Sonos updates include fixes for some bad security issues that were recently discovered. If you can't update that computer, you'll need to use another device to control your Sonos system. There are free apps available for iOS and Android controllers. More details on system compatibility can be found here.