Change Spaces on all connected displays at once Just a simple question - my day-to-day setup is a MacBook Pro with 2 connected external displays. I want to try to organize my different "tasks" (writing code, testing/web browsing, and notes) into different Spaces. The keyboard shortcuts to change Spaces only take effect on my currently-selected screen.

Is there a way to change Spaces across all displays at once? If not with a built-in function, maybe a third-party app?
There's a System preference for this, but then it makes fullscreen apps occupy only one screen at a time and the rest of the screens are black. To activate it:

Preferences -> Mission Control -> uncheck Displays have separate Spaces

reference: Apple site