The direction in the manual to use the Mosaic app may indicate some degree of proprietary implementation, but I can’t be sure of that. Minimserver is not necessary and should not be used with Audirvana, as Audirvana itself acts as what’s known as an “ad hoc” UPnP server and control point.
I realize this is a different issue, but ever since I upgraded my Macbook pro to Sequoia 15 while playing a track the music randomly stops playing and the computer crashes and shuts down. I have to reboot and start over. Has anyone else had this issue.
Not seen stops and crashes just UPnP endpoints missing after a reboot.
In your case I would make sure system settings/network, wifi network has the private WiFi setting set to “fixed” not “rotating” addresses. I could imagine that there would be an issue if macOS rotated the MAC address of your Mac during playback. Having rotating MAC addresses has created issues for users of other playback software judging by some forum posts. macOS sets the setting to rotating normally when using a public WiFi hotspot but Sequoia can be a bit unpredictable when it comes to networking issues.
Have you updated to macOS 15.3?
More information is needed for folks to be able to provide insights into your experience (playback set-up, network set-up, etc…)