Question: What is this weird scroll bar doing in my screen
I just noticed that on my second screen (Dell) there a little black bar near my dock that resembles a scroll bar, and it doesn't do anything nor will it go away (see image; on the right, just between 'textWrangler' and 'Downloads').
Do you know what it is and how to get rid of it?
It only occurs on my second screen, if i unplug my MBP screen does not have it.
MBP touch bar late 2017, OS Sierra 10.12.6.
2nd Screen dell, connected through a belkin docking station.
MacBook Pro TouchBar and Touch ID, macOS Sierra (10.12.6), 15"