Good cable merely poorly shielded

Unfortunately, I now realized after repeated experiments that the image is indeed top, but when I try to run on my Mac, this gets no Internet connection there. The cable must be shielded so bad that the Airport of my MB is disturbed. Unfortunately, I can not really use it so, I will also often times so surf the internet while I connected my computer to my beamer.

So if a reasonably priced cable looking for any connection without Internet is the right place, otherwise stay away !! ... Unfortunately