audio doesnt work after update to 10.14.1

Hello,

I have my MacBook Pro yesterday updated to Mojave and since the update no more sound. I try to explain the problem a bit more detailed here and I hope that I can help with troubleshooting.

(All screenshots are in German, I hope that they are nevertheless understandable.)

Short system info to start with:

First of all if I want to adjust the volume, only the following symbol appears on the desktop. And when I open any application which can play sounds or use audio, the beachball appears for many seconds.

I can not open the system setting "Sound". Error message: "The system setting "Sound" could not be loaded."

Under System Information, the Audio tab is empty.

In the system console (Error Log) the following error appears continuously (once per second):

com.apple.xpc.launchd[1] (com.apple.audio.coreaudiod): Service exited due to SIGSEGV | sent by exc handler

com.apple.xpc.launchd[1] (com.apple.audio.coreaudiod): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.

Things I've already tried:

- Mac OS reinstalled with Command & R (after restart)

- EtreCheck executed (finds no error)

- PRAM reset

- SMC reset

- "sudo killall coreaudiod" -> no matching process

- "sudo launchctl start com.apple.audio.coreaudiod" -> No effect

Any ideas to fix this problem?

Thank you so much!