I have macOS Monterey 12.4 on a new M1 MacBook Air. Currently, I regularly find my spaces to be mixed up. This is annoying since I then have to stop what I am doing and fix them up in Mission Control. In addition, I find that every time this happens and I re-open Firefox, I lose access to any minimized windows, as it seems that Firefox is trying to open them in a nonexistant space. Obviously, I do not want to lose my open tabs, and I switched to Firefox partially to prevent this from happening (as Safari seems to get more and more flaky every year).

I have uploaded a screenshot showing that the setting is, in fact, disabled. I have tried toggling it, restarting, etc. and it continues to incorrectly behave.

System Preferences > Mission Control

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    Are any of these fullscreen Spaces? Basically fullscreen breaks Spaces, because each new Space is simply added to the right of the last. On quit/relaunch, the order is going to be pretty random. Also, Spaces was never designed to differentiate one app over more than one Space.
    – Tetsujin
    Commented Jul 9, 2022 at 8:40
  • @Tetsujin no, I don't use any full-screen apps. Not sure what you mean by "differentiate one app over more than one space" Commented Aug 3, 2022 at 0:48
  • One app can only be in one Space. If you have different windows in different Spaces, you confuse the system.
    – Tetsujin
    Commented Aug 3, 2022 at 15:28
  • @Tetsujin that's simply not true. I can have finder windows open in each space. Ditto for Terminal, Safari, Firefox, QuickTime, etc. Commented Aug 12, 2022 at 6:19
  • Reboot & look again. I didn't say you couldn't force it to, I said it confuses the system.
    – Tetsujin
    Commented Aug 12, 2022 at 6:22

1 Answer 1


The issue resolved itself after a few weeks, or maybe a software update. I'm not really sure, it just stopped happening and I forgot about it.

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