macOS 27 Activates Mission Control when Dragging Files to Zight Menu Bar App
Posted October 6th, 2026 @ 02:56pm by Erik J. Barzeski
Since upgrading to macOS 27, dragging a file to the Zight menu bar item (to upload it) would trigger Mission Control.
This got super annoying, and no settings stuff seems to have really done anything to fix it. Even the one that is called "Drag windows to top of screen to enter Mission Control" didn't stop this, because I was dragging a file not a window. (It did turn off dragging windows to the top triggering Mission Control, as it says.)
So…
defaults write com.apple.dock enterMissionControlByTopWindowDrag -bool false;killall Dock
Somehow, that seems to resolve the issue, but it's strange because it's just toggling the same thing as in the System Settings.
Edit a few hours later: It worked for awhile, then stopped. So, scratch that. The best work-around I've found is to open the Zight window/menu, and drop items onto that as it's well below/away from the menu bar.
P.S. Dragging windows to the title bar does not bring up Mission Control. Dragging files does. Grrrrr.
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