Mac Os Sierra USB connection

Sorry guys, I know this has been posted here a hundred times and I read all of these posts, but I could not find any solution so far:

I have a brand new Uno R3 with an ATMega 32 chip (my first one so please be patient with me)
Running Mac OS 10.12.2 on Retina 2015 model
I installed the latest IDE (18)

in the IDE under tools I have only the Bluetooth port nothing else

I tried to install FTDI drivers and CH340 drivers and I think every other solution mentioned in the recent posts here. When I install new USB drivers (no matter which) I do not see any new files in /System/Library/Extensions although setup tells me it finished successfully.

Honestly I have no idea where to look anymore. So I would really appreciate if someone could point me in the right direction.