- Fix crash when no AVB devices are found, but the app menues are used (Stream Format, Configure…)

Out of curious I did a test, not having any AVB devices, but downloaded this controller app and it does exactly what OP describes above, no UI and it crashes when format setting changes, format setting from menu, the menu is accessible.
The app itself is an empty field. (no surprise as there is no AVB device)
Has OP forgot to connect AVB device to the computer ?

Without a device connected the window says (usb device not connected) in the title-bar.

The device was connected when I tried. Disconnecting it and reconnecting it got detected by the AVB Controller. It also got recognized in "Fireface USB Settings".

Did you Connect a Network Cable to an AVB Switch?
How do you set the format if there is no UI?

Yes, the device was connected to a AVB switch.

The AVB Controller window is empty (no UI) but in the menu-bar I can choose "Entity" -> "Stream Format..." or "Digiface" -> "Configure...".

Someone may think the RME AVB controller app is a standalone software for Mac built-in AVB ?

The AVB Controller window stays empty unimpressed of what I try (Reload, Stop/Start, adjust the entity, etc) but notices if I unplug the device from usb.

If I try to set the stream format AVB Controller crashes.

What else could I try?

The RME AVB controller app (under mac OS) has an option to be disabled. You can activate the controller by the menu "RME AVB Controller - Stop -> Start" or disable it by "RME AVB Controller - Start -> Stop". This option is usefull if you want to use another avb controller app, example: Hive. The AVB Endpoint ist still running in the background even if the controller is stopped.

Ohhh I wasn't aware of this setting - this has fixed it!! Everything is showing up again as normal. Many thanks for your help.

Isa

If this is the issue I saw on Mac before, try this: choose Entity from the Options menu (top bar) for the RME AVB controller app, then select Configurations from that entity menu.

Thanks for the suggestion. Sadly not the answer - Entity > Configurations seems to have no response at all (all other Entity menu options do open windows with limited options / stuff missing).

This sounds similar but I think slightly different, in that all my other devices' streams are showing and working correctly still. So 2x 12mics and AVB Tool have all the right input/output streams & syncs etc, I just can't change anything DF AVB-related as the controller is totally blank.

Also I have this behaviour on Sequoia as well as Tahoe so I don't think it's OS related. It's all worked without issue for 4 years, until my last update to the latest firmware / drivers a month or so ago (only just getting round to troubleshooting now).

I'm not sure what it was - could not get it back to functioning on the mac mini - i had a dev network setup here and was sharing the avb tool and m32da i/o via totalmix with the DF AVB on the mac mini and a couple of windows pc's using Biamp hardware - worked reliably for the past year - I just swapped it around and connected the DF AVB to one of the PC's and I'm using apple's built-in AVB support to stream from the mac to the pc now - I'll probably leave it like this for the time being.