This morning I tried to use scp to copy a single large file from my old Linux Ubuntu machine to my brand new 2017 Mac Book Pro. I ran into a very strange problem: scp would happily copy 95% of data (around 150 MB/sec) - to then "stall", and at some point tell me about broken connection. Afterwards, I basically had no more LAN access.

This happened on MacOs Sierra. What could be the reason?


Turns out: the culprit was neither the Mac itself, nor my Linux box.

I later found that the LogiLink USB-C to Ethernet adapter caused this.

And for the record - there were various other symptoms, such as:

  • download of large files in my browser being extra slow
  • replicating large files via IBM Notes not only being slow, but basically turning the whole machine into "almost unresponsive" mode

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .