Hammerspoon script to disable Mission Control on macOS

init.lua

disableTopScreenEdgeForDragging = hs.eventtap.new({ hs.eventtap.event.types.leftMouseDragged }, function(e)

    local loc = e:location()

    if loc.y == 0.0 then
        hs.mouse.setAbsolutePosition({ x = loc.x, y = 0.01 },
                1337 -- a hack, do not remove
        )
    end
end)

disableTopScreenEdgeForDragging:start()

Thanks for the additional info. Looks like I'll have to replace the keyboard.

This script now interferes with macOS Sequoia's window tiling system, meaning it prevents windows from filling the screen when dragging to the top edge.

I have made a workaround for this by adding a new event listener on left mouse up:

function fill()
    hs.application.frontmostApplication():selectMenuItem({"Window", "Fill"})
end

function fillOnTopScreenDragging(e)
    if e:location().y == 0.0 then
        fill()
    end
end

hookLeftMouseUp = hs.eventtap.new({hs.eventtap.event.types.leftMouseUp}, fillOnTopScreenDragging)

hookLeftMouseUp:start()

Thanks for your update @yrnehli. Do you know if the original issue with window dragging and mission control activation is still there? I stopped using hammerspoon completely a while ago and the problem seems to be gone (at least for me). Not sure if it got fixed in some os update or I changed sth in my settings in the meanwhile. My last investigation of this issue was more than 2 years ago.

@raxigan Yeah, the original issue is still present - you have to drag quite quickly and violently to the top of the screen but it still triggers mission control. It annoyingly interferes with the new native macOS tiling system...

The only other tool I've seen where you can disable this is BetterSnapTool.