CleanMyScreen is a free, open-source macOS utility for temporarily blocking accidental keyboard and pointer input while you clean a display, play a video for a child, or let a pet sit near your Mac.
It is built natively with SwiftUI, AppKit, Core Graphics, and IOKit. There are no accounts, payments, trials, subscriptions, telemetry, or network access.
Download the latest release · View the source · MIT License
| Mode | What stays visible | What is locked |
|---|---|---|
| Cleaning | Pure-black overlays on one or every display | Keyboard and pointer input |
| Pet / Kid | Your current video, webpage, or application | Keyboard and trackpad/pointer input |
| Selective | Your current desktop | Keyboard, built-in trackpad, compatible external devices, or any combination |
Every session includes a three-second countdown, an optional automatic timeout, and a three-second Escape-key emergency unlock gesture. Ending a session restores overlays, the cursor, seized devices, and every brightness value the app was able to change.
Choose the DMG that matches your Mac:
CleanMyScreen-arm64.dmgfor Apple Silicon Macs (M1, M2, M3, M4 and newer)CleanMyScreen-x86_64.dmgfor Intel Macs
Open the DMG and drag CleanMyScreen into Applications. The current public builds are ad-hoc signed rather than notarized with a paid Apple Developer ID. On first launch, macOS may require you to open the app from Finder and confirm it in System Settings → Privacy & Security.
Published SHA-256 hashes are available in SHA256SUMS.txt on the release page.
macOS requires Input Monitoring before an app can observe and suppress input sent to other applications. CleanMyScreen asks for it only when a lock session needs it. If macOS no longer repeats its permission prompt, the app offers a button that opens the exact Input Monitoring pane. On configurations where the active event filter remains unavailable, it also links directly to Accessibility as a compatibility fallback.
The app does not record, store, transmit, or inspect keystroke contents.
Apple's Swift command-line tools are enough for local development:
./Scripts/run-tests.sh
./Scripts/build-app.sh
./Scripts/build-dmgs.sh
open dist/CleanMyScreen.appbuild-app.sh produces a universal Apple Silicon + Intel application and applies an ad-hoc local signature. build-dmgs.sh creates separate architecture-specific disk images, verifies them, and writes their SHA-256 hashes.
run-tests.sh uses Swift Testing's bundled framework because Command Line Tools alone do not include the xctest launcher. With full Xcode installed, swift test can be used directly.
Full Xcode is only required for an Xcode project workflow, Developer ID signing, notarization, or App Store distribution. The current brightness implementation uses a private CoreDisplay fallback, so an App Store build must replace or disable that capability before submission. Local and Developer ID distribution are the intended paths for this release.
- Brightness control is best-effort because macOS has no single public brightness API for every built-in and external display. Unsupported displays remain at their current brightness.
- Device-specific trackpad and external-device locking depends on what the connected HID hardware and macOS allow the app to seize. If a device cannot be safely isolated, the app reports the limitation and leaves that input available.
- On a desktop Mac with no built-in keyboard, one external keyboard is deliberately kept available for the emergency unlock gesture.
- Devices connected after a session starts may remain available until that session is restarted.
- CleanMyScreen is an accidental-input guard, not a login lock, parental-control boundary, or security product. Power, Touch ID, force quit, and other system-reserved operations remain available.
CleanMyScreen is released under the MIT License.
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