And what can I say: This all works perfectly together. (!) The combi - connection of the MBP recognizes the four-pin connector, but only under one condition:
The headset with his two pin terminals first (!) To the adapter, then selfsame to the MBP. In the sound settings can be admired that is combined in use / out for headphones and (!) In an external microphone.
Works with all programs so far without any problems, it is, moreover, the same recognition as the Apple headset.
For processing, I can say:
solid, fits well with Apple products, unfortunately, the body of the adapter is actually slightly yellowish, so you have to live, but it leads to the withdrawal of a star in the B-Note.