MAC MULTI-MONITOR GUIDE

Mouse stuck between monitors on Mac? Fix unreachable cursor edges.

When two displays have different sizes, resolutions or vertical alignment, part of one screen edge may not touch the next screen in macOS. The pointer stops there because macOS sees no neighboring display to enter.

First, check the display arrangement in macOS

1. Open System Settings → Displays.
2. Choose Arrange.
3. Drag the display rectangles so their shared edge roughly matches the physical monitors on your desk.
4. Test the cursor along the top, middle and bottom of that shared edge.

If the arrangement was simply wrong, this is the cleanest fix. But when displays have different logical heights, aligning one section of the edge can leave another section unreachable.

Why the cursor still gets stuck

macOS moves the pointer through the virtual display layout, not the physical gap between your screens. A 4K monitor using one scaled resolution and a MacBook display using another can have very different logical dimensions. Wherever the rectangles do not overlap, there is no valid crossing point.

How DisplaySpan repairs the edge

DisplaySpan watches pointer movement and dragging. When you push through an otherwise unreachable edge toward a neighboring display, it moves the pointer to the nearest valid crossing on that display. Normal crossings stay normal.

The cursor feature does not require Input Monitoring permission and does not upload pointer activity. You can switch it off at any time from the menu bar app.

When it will not help

Cursor edge repair does not create a virtual display, change your resolution or guess that two completely separated displays should connect. Arrange your displays in macOS first so the intended screens are neighbors.