Some change in 0.18.10 has messed up fullscreen mode on OS X. It used to be that Factorio showed up a single time in the full-screen app switcher. Now it shows up 2x in the switcher, and one of them has no content. The OS will automatically switch off of it if you try to switch to that one. The actual game is fine, but there is some weird graphics or background stuff that's newly messed up.
Confirmed with a downgrade that this is 0.18.10 only, everything works fine on 0.18.9.
Log file attached FWIW.
[0.18.10] OS X fullscreen reserves an extra blank desktop
Re: [0.18.10] OS X fullscreen reserves an extra blank desktop
I meant the blank desktop itself by "weird stuff." I agree that this sounds like a duplicate; I am running with mods, so it is reasonable to assume they are related. Please feel free to consolidate.
Re: [0.18.10] OS X fullscreen reserves an extra blank desktop
Interesting. There was no change even remotely related to windowing systems in between 0.18.9 and 0.18.10. It sounds like 70191 wasn't happening on your computer and it started to happen, but only with specific version of the game?