I have two Arduinos, A cheap china-knockoff and an original one. I have had no problem with either of them before. But when I moved from connecting the original with a USB A-hub to running it over USB-C my computer can't find it any more.
I run OSX and tried to install a new USB serial driver. Didn't work either. Then I tried the cheap clone, same computer, same wire, same computer and it works fine.
The faulty Arduino powers up and I can reset it. So it seems to be working. What might cause this?