Thank you for your fast response and solution. Excuse me, I didn’t found this Trouble Report(s) and sorry for answering so slowly.
First of all, I have to admit that my description about the OS X versions wasn’t right, with OSX 10.9 and 10.10 I was able to successfully connect the iPhone via the USB passtghrough. The workaround is working… as described in the TR you just have to reconnect the iPhone via NoMachine-menu.
With OS X 10.11 I was able to connect a USB thumb drive (after editing nxusb.sh) and as previously stated the iPhone is connected (check via terminal “ioreg -p IOUSB) but didn’t show up in iTunes or other apps… I’ll keep on waiting eagerly 🙂