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After updating the MacBook Air running the Roon Server from macOS 15.3 to 15.4, the Audio Zone no longer appears.Toggling the “Local Network” setting ON and OFF had no effect.
The MacBook Air and the Linux machine running Roon Bridge are on the same network segment and connected via wired LAN.
There needs to be a pinned post so that this Mac issue is not endlessly re-explained. It is an easily solved problem that is repeatedly listed, but users are not searching the fourm before asking.
It was working without any issues on 15.3.
Toggling the “Local Network” setting ON and OFF had no effect.
Since the issue caused by macOS Sequoia 15.3 had already been resolved and closed, I created a new post. The solution that was suggested for 15.3 does not seem to be effective in 15.4.
If I’ve overlooked a solution, please let me know.
Hi 7NotesScale,
Sorry for the lack of explanation. Before posting here, I checked this forum for similar issues and tried the suggested solutions, but the Audio Zone still doesn’t appear. It’s possible that Apple changed some local network security settings in 15.4.
After togglng off and on the Roon entries in “Local Network” did you close Roon Server app via the menubar item, quit option, then re-open the Roon app?
I have always found this restores access, in my case rebooting the Mac after toggling the Roon entries often results in a repeat of the no access condition however leaving the mac running after a toggle and just closing the Roon server app and restarting Roon always works.
Yes, after turning it OFF and ON, I stopped the Roon Server from the menu bar using “Quit”. However, the situation hasn’t changed and the Audio Zone is still not visible. Is your Mac running Sequoia 15.4?
Yes, running 15.4.
Hi @Hiro_Ishii ,
Thanks for reaching out with your technical support request.
You mentioned “the” audio zone does not appear. Does this mean that one zone in particular is having issues, while other zones on the MacBook Air continue to work as expected? If it is just one zone, can you please confirm the model/manufacturer and how it is connected to your Mac? Also to confirm, are there any firewalls, antivirus or VPNs that could be interfering in your setup?
Noris-san
Thank you for your support.
There are two zones in my Roon network. One is running Roon Bridge and Diretta host on a Linux OS. The other is running Roon Bridge and HQPlayer on a Linux OS. Neither of them is visible from the Roon Server. This issue did not occur when the Roon Server was running on macOS 15.3. The firewall is disabled, and I am not using any antivirus software or VPN.
Hey @Hiro_Ishii,
Thanks for the update! From your account admin, we do see a few HQ player devices that were connected a few days ago. However, their IPs may potentially be on a different subnet than your machine running Roon Server.
Do you know if you have multiple active subnets within your local network? You can typicall see these within your router settings, you’d see devices on, for example, a 192.168.0.x IP as well as 192.168.12.x
See how things look, and if you’re able to move everything onto the same subnet. We’ll be on standby for your reply! 
benjamin-san
Since the AudioZone doesn’t show up on my MacBook Air running Sequoia 15.4, I’m using an older MacBook with Big Sur and installed Roon on it. I just can’t go without music! The Big Sur Mac works fine, but since it’s old, I’m a bit worried it might break down one day.
Like you pointed out, I used to use the 192.168.0.x segment, but about a month ago I set up a dedicated 192.168.12.x segment just for audio and moved everything over. I think the HQPlayer address you’re seeing is probably from when I was still using the old segment.
Do you think the reason the AudioZone isn’t showing up on the Sequoia system could be something to do with the Mac’s local network settings?
Hi @Hiro_Ishii,
Based on your account admin, as I mentioned in my last response - it looks like your audio devices might have reverted back to their prior IP subnet only a few days ago. I’d first attempt to reset them to your dedicated audio segment first. Maybe even temporarily disable your other subnet and see if that makes a difference.
We’re seeing this information on your MacBook8,1 running Mac OS X 11.7.1.
Hi benjamin-san
The audio network devices (192.168.12/24) are connected to the router via wired connections and their addresses will not change to the previous range (192.168.0/24). Devices on the 192.168.24.x network access the internet via the 192.168.0.x network, so it might have appeared to the admin on your side that their IP addresses had changed to 192.168.0.x.
Also, in the Audio menu, there is still data for HQPlayer registered with the old address, which may have caused some confusion. HQPlayer has not been launched for the past few days.
for your information, I’m uploading a screenshot of the Roon audio settings running on Big Sur 11.7. When using the Roon server on Big Sur, the Roon Bridge is recognized and the audio zones are displayed.
Today, Roon was updated, so I tried updating the Roon server on Sequoia 15.4 as well, but the Roon Bridge was not recognized and no audio zones were shown. (Of course, the Local Network setting was turned ON/OFF during testing.)
Hi @Hiro_Ishii ,
Thanks for the additional information. Can you please share a screenshot of how your Roon Settings → Audio page looks like? I know you mentioned you having both a Big Sur and the Macbook air, but what is strange is that they are both showing as having the same IP, perhaps this is an IP conflict?
Hi noris-san
As I mentioned earlier, the audio network is connected via wired Ethernet and there is no Wi-Fi. Also, since there is only one Ethernet adapter, I switch it between the Big Sur Mac and the Sequoia Mac.
Because the addresses are assigned via DHCP, both Macs are given the same IP address, but they are not used simultaneously.
I’ve attached a screenshot of the Audio menu.
Today, an update for Sequoia was released, so I installed it, but the issue was not resolved.
Hello @Hiro_Ishii ,
Thank you for the screenshots, it does look like the Mac is not detecting the Roon Bridge for some reason. The Roon Server is hosted on the other Mac, is that correct? Can you try to perform a reinstall of Roon using the below instructions on the Macbook Air (not on the main Roon Server) and let us know if this helps? Thanks!
Here is the process outlined from a macOS machine:
Hi noris-san
I reinstalled using the steps you gave me. roon rebuilt the database but could not find Roon Bridge. i also tried Local Network Off/On in Mac Security but the results were the same and it did not work.
Just to be sure, I manually added an IP address (192.168.12.200) instead of DHCP, renamed the folders, and reinstalled, but the result was the same: it could not find the Bridge.
Hi @Hiro_Ishii,
Thanks for the update - a small side test, if you haven’t yet, could you please reboot your router, as well as the bridge device and see if you’re able to get the device properly recognized?
We’ll be on standby for your results - thank you! 
Hi @benjamin
I have rebooted the router and Roon Bridge several times and the problem persists!
