I have multiple Sonos products. Sonos Controllers are on Android and iOS products -- all wireless -- and one iMac M1 running MacOS 11.5.2 Big Sur that has the WiFi turned off -- and I have reasons not to have the iMac on WiFi. This iMac is hard-wired to a switch that, in turn, is driven by an IP address set by an Eero router. This same switch is hard-wired to a Sonos Boost. As a result, all of my Sonos products are in “wired mode (WM:0)” All computers, Sonos products, and Sonos Controllers have been updated to the latest releases.
Recently, I’ve noted that the iMac’s Sonos Controller does not always show all of the Sonos products in my house. The products that it does show work fine, as does access to the music library that is on a NAS, as well as other subscribed streaming audio services…..just some devices are missing. Doing a “Force Quit” of the Sonos Controller on the iMAC, followed by a restart does not solve the problem. Rebooting the iMAC does not solve the problem.
So here’s the odd part. I can put the iMac into wireless mode and disconnect its Ethernet cable. Suddenly, all of the Sonos products are visible on the Sonos Controller App. I can then shut down WiFi on the iMac, replug the Ethernet cable, and I’m off to the races. Everything works fine until I reboot the iMac.
This only recently started. No changes have occurred to the underlying system architecture. The iMac M1 is new. I know that all of the Sonos products have to be on the “same network” -- and they are effectively, in the sense that both the iMac and the Sonos Boost are on the same switch driven by the Eero router (as are all of the wireless Androids and iOS units). It’s a head-scratcher for me. Anyone have an idea?
