Problem is that I am using iMac mi 2007. I can’t install 10.12 os. I can’t imagine Sonos have not solutions for previous version. Heaven I didn’t read any avertis for tell me the newer version was not compatible.
The requirements for the Sonos App has always been stated here:
https://support.sonos.com/en-us/article/sonos-app-requirements
The partly supported older operating systems are listed here:
https://support.sonos.com/en-us/article/using-sonos-with-unsupported-operating-systems
If your OS is supported, or partly supported, then checkout the below information for Sonos App installation on a MAC PC…
Authorise the “Sonos Installer” under System Settings → Privacy & Security → App Management. Once allowed, you should be able to use auto update from the Sonos App itself to install the latest version of the Sonos App.
Hope that info. assists.