Free for macOS

Mouse Lock

A tiny menu bar app that keeps your cursor on one display. Built for presenters using ProPresenter, Keynote, or any extended-desktop setup.

Download latest release ☕ Buy me a coffee View on GitHub

Features

Lock the cursor to any connected display
Toggle with ⌃ ⌥ L or from the menu bar
Optional wrap-around at screen edges
Runs from the menu bar — no Dock icon
Auto-detects when displays are plugged in or removed

Install

Download MouseLock.dmg from the latest GitHub release.
Open the DMG and drag MouseLock into Applications.
If macOS says it cannot verify the app: open System Settings → Privacy & Security and click Open Anyway. Or run xattr -cr /Applications/MouseLock.app in Terminal.
Look for the icon in the menu bar (top of screen) — there is no Dock icon.
Click the display icon in the menu bar, pick your screen, and lock.

Build from source

Clone the repo and open MouseLock.xcodeproj in Xcode.
Press ⌘ R to run. Requires macOS 13+.