Thanks for writing in and for sharing your report! They point to the Mac mini, not your iPhone update.
Your WiiMs were playing normally until about 3:47 PM, when the Mac mini restarted. Since then, Roon Server can still find your network devices but can’t connect to any of them. That affects both WiiMs, your NAD C 3050 and your MacBook. This usually means macOS is blocking Roon’s access to the local network.
Could you try these steps on the Mac mini?
Open System Settings → Privacy & Security → Local Network. Find Roon, then switch it off and back on, even if it already shows as on.
Fully reboot the Mac.
Then, open Roon, and click Allow if macOS asks about finding devices on your local network.
The Mac mini is also connected over both Ethernet and Wi-Fi. Since it’s wired, we’d suggest turning Wi-Fi off on the Mac mini to keep things simple.
Let us know how it goes. Please also tell us whether your NAD shows up again after these steps.
Thanks for trying that. It’s clear from fresh Roon Server logs, Roon Server can see your WiiMs, NAD and MacBook but can’t connect to any of them. Your Mac mini runs the Roon app, and macOS sometimes keeps blocking it from the local network even when the setting shows as on. The same thing happened briefly on October 7 right after a Roon update, so we’re fairly confident it’s this permission. Here’s what we’d like to try next:
Check every Roon entry. In System Settings → Privacy & Security → Local Network, look for any entry related to Roon (for example Roon, RoonAppliance or RAATServer). Make sure every one is switched on, and let us know which ones you see.
Quick test. On the Mac mini, open Terminal and run ping -c 3 192.168.4.28. Tell us whether you get replies. This shows whether the Mac can reach the WiiM outside of Roon.
Reinstall Roon on the Mac mini. This makes macOS ask for permission again. Your library and settings are stored separately and won’t be affected, but it’s a good idea to run a backup first (Settings → Backups).
Quit Roon, drag Roon from Applications to the Trash, and empty the Trash.
Restart the Mac mini.
Download a fresh copy from http://roon.com
, install it, open it, and click Allow on every prompt about finding devices on your local network.
We also noticed a VPN (it looks like Tailscale) running on the Mac mini. If the steps above don’t help, please quit it for a moment, restart Roon, and see whether your devices come back.
Let us know how it goes. The ping result especially, will help us narrow this down.