[0.14.17 Mac] 2 Black Windows & Factorio

[Titan21]

Hey,
I'm pretty confident I've read something about it before, but I couldnt find it in the forum again:

When Starting Factorio on a mac, and then going to the ... umh, what do you call it? ... Window-overview (see Screenshot) then Factorio opens three windows in total.
Two of them are blank / black. One of them is titled "Factorio 0.14.17", the other one "factorio" and the actual game "factorio".

My problem with it, is that I always want to have Factorio on my second 'virtual' desktop (so I can switch between Factorio and other programs by swiping left / right).
Since Factorio always opens with 3 windows I have to move all of them to another screen.

Sorry if this has already been answered, I searched for all combinations of Mac, OSX and Black in the Support Forum and couldn't find anything about it.

Awesome work guys, have a good start into the week!

Cheers,
Titan21