does Totalmix open ?
As you say Fireface USB settings is showing 32kHz sample rate, then Totalmix should open and work...?

No, total mix won't open. Sample rate on unit says 48k, usb settings says 32.

Update -
1. Installed kernel drivers again, all fine.
2. Ran flash update too. Updated DSP version from 10 to 18. Otherwise, all were the same.
3. Reboot, all good and working.
4. Install driverkit
5. terminal says "/dev/fd/12:18: command not found: compdef"
6. otherwise, it prompts for the sudo pass to remove the kernel extension. All good.
7 everything finished without issue, says reboot, I reboot.
8. No interface again.

For now, I installed the kernel drivers again, but I can't get driverkit to work.

Thanks

Again my question from above:

Might be, but the sentence in my first reply (#3) was clear enough I think.

Hello
I have difficulties ton connect My Fireface UC to my new Mac Studio M2 with Sonoma.
I've been working with the kernel kit driver 331
the driver kit driver 410

- I tried first to follow the procedure described on the website, It wasn't successful.
I installed the dkd410, then firmware, and then after several reboot and install of ked331  I could update the firmware ( 135 to 138 )

Now I can see the presence of my up-to-date Fireface in the USB section of my Rapport system.
BUT the Fireface isn't part of the audio peripherals.

- As I read that maybe, the kernel extensions were juste useful for the firmware update, I removed everything and just reinstall the dkd 410. Every time he was asking me to allow something, I did. The Fireface usb setting windows open, "no device connected" and in the same time it asks me to reboot.

- When I do, I try to open Fireface usb settings, with no success.
- Totalmix opens, but I cannot open any window because it doesn't see any device ( logical ).

Everytime I retry a process, I clean all the RME/fireface/totalmix files from my system, disabling the SIP while a short moment to be able to do it properly.

Then I've tried to install ked331 then dkd410 : it asks me to allow an access to terminal, where I'm asked to enter my password, and I get this error message :
error domain=kmerrordomain code=31 "error occurred while building a collection: cannot build collection without binaries as only 1 codeless kexts provided" userinfo={nslocalizeddescription=error occurred while building a collection: cannot build collection without binaries as only 1 codeless kexts provided} margottestemale@mac-studio-de-margot ~ %

Then I've tried to reinstall simply the dkd410 and when I install after it the ked331, and when I try to laugh Fireface usb settings, the computer just crash (!) and the detail when I reboot said the problems comes from kernel REM extensions.

Then I removed in recovery the kernel extensions in the terminal with the command kmutil trigger-panic-medic --volume-root /Volumes/MacintoshHD

Than I retry everything, several times, no success.
I would really appreciate some help, with a procedure step by step if anyone has the patience to do so.
Thanks

@oli77sch

Yes that was it. I don't really get how is it possible because I'm pretty sure I didn't change this setting because it has to be done with the RME unplugged !
And when when I switched my Mac I just plugged immediately the Fireface without moving it of even one centimeter.
I'm feeling so grateful now, I barely cried ... thank you so much !