Why macOS cursor transitions are broken
If you use multiple monitors on your Mac, you’ve felt this: your cursor is moving toward another display and just… stops. It hits an invisible wall at the edge of the screen where the two displays don’t line up.
The dead zone problem
macOS arranges displays as rectangles. When two displays of different heights share an edge, the taller one has a section with no neighbor — a dead zone. Your cursor reaches that zone and has nowhere to go.
This isn’t a bug. It’s how macOS display arrangement works: a strictly spatial model where cursor movement follows physical pixel coordinates. If there’s no pixel to move into on the adjacent display, the cursor stops.
For a MacBook Pro (1080px logical height) next to a 4K display (1440px logical height), the top 360 logical pixels of the 4K display’s shared edge are a dead zone. That’s 25% of the edge where your cursor gets stuck.
Why proportional mapping fixes it
Instead of mapping cursor position by absolute pixel coordinate, you can map it proportionally: the top of one edge corresponds to the top of the other, the middle to the middle, the bottom to the bottom — regardless of the actual pixel heights.
This means there are no dead zones. Every point on one edge has a corresponding point on the other.
Displace
That’s exactly what Displace does. It takes over cursor transitions between your displays and maps them proportionally via configurable edge links. You set it up once on a visual canvas, and your cursor moves between monitors the way you’d expect it to.