DockGuard

On a Mac with several monitors, touching the bottom of a secondary screen drags the Dock over to it. DockGuard fences off the last few pixels of those screens — 1 to 12, your choice — while leaving shared edges open so stacked screens stay crossable. It offers three cursor-correction modes, starts at login, spots a stale Accessibility permission and can self-test its geometry from the command line. One Swift file, no dependencies, free and CC0.

• macOS
• Swift
• Utility