DJM 900 NXS Driver Problems with Mac

Hey Community,

I really need some help.

I had a booking yesterday and couldnt get my setup running, had to drive home to get my Serato Box.
I had to update my macbook to Sierra 10.12.6 because I installed After Effects, and it wouldnt let me install it with an older version.

Before I updated I checked the Serato Homepage if the newest Serato version supports 10.12.6
I am running Serato Version 2.3.2

When I got to the Club and plugged into the mixer like I always Do I couldnt get a Signal from the CDJs, I can play songs in Internal Mode and they will Play on the Mixer without a Problem.

I read into the Problem and found this:
https://www.pioneerdj.com/-/media/pioneerdj/downloads/other/troubleshooting/troubleshooting_highsierra_003_e.pdf

I did everything that is described but still couldnt get it running.

Uninstalled the driver, rebooted.

Reinstalled the driver... tried that a couple of times.

The Driver is not blocked by Security Settings.

And nothing shows up under SYSTEM INFORMATION / BLOCKED SOFTWARE

The Problem is that I do not own a nxs 2 myself, so its hard for me to try it out and play around. I just go to clubs, plug in and use their mixer... So I can not make a Firmware update on the mixer, since its not mine and it can be a different mixer at every gig I play.

I also tried switching the mixer Output in the Driver settings, I read that you have to switch it to the opposite from what it is and switch it back again...
I played around with it but still could not get it working.

After 1 Hour of playing around I had to drive home to get my SL2. 

I would really appreciate any help here.