AirSnoopGuardPractical guides
Screen overlay, privacy filter or Mac Lock Screen?
Choose for the situation: an overlay responds to your head movement, a physical filter narrows viewing angles, and Lock Screen requires authentication to resume access.
| Option | Useful when | Limits to know |
|---|---|---|
| AirSnoopGuard overlay | You stay at the Mac but turn your head away. | Needs valid tracking and configuration. Looking ahead leaves the screen visible; partial coverage may reveal content. |
| Physical privacy filter | You want to reduce side viewing while working. | Effect depends on the filter and display. Straight-on viewing remains possible; brightness and clarity can change. |
| macOS Lock Screen | You step away or need authentication before access resumes. | Interrupts the session and requires unlocking. It is not continuous side-view protection while you work. |
What AirSnoopGuard actually does
It uses supported head-motion data to extend a frosted overlay across displays as you turn away. Returning to your center clears the overlay. It does not identify a bystander, authenticate the user, or lock the operating system.
Requires macOS 13 or later. AirPods motion requires macOS 14 or later and headphones that provide supported head-motion data. Camera fallback requires a built-in Mac camera; external webcams and iPhone Continuity Camera are not selected.
These tools can complement each other
For a shared desk, consider a suitable physical filter for side viewing, an overlay for brief turns away, and Control–Command–Q whenever you leave. Check the effect from the relevant angles at your actual desk. Do not assume a combination guarantees privacy.
What is free, and what is optional?
Headphone-based protection is free. Optional camera fallback is a one-time in-app purchase, available separately or included in Pro. Existing camera access is retained. No subscription or app account is required. Check the App Store and the in-app offer for current availability and local pricing.
If you do not have compatible headphones, check built-in camera availability before buying camera fallback. Preview 10 sec demonstrates the overlay without proving that your sensor hardware is compatible.
When AirSnoopGuard is not enough
It is not a substitute for authentication, a managed-device security policy, or controls over screen capture and screen sharing. Multi-display and full-screen behavior should be checked on your own setup before displaying sensitive work.
AirSnoopGuard provides visual screen coverage, not a system lock or identity check. A partial or translucent overlay can leave information visible. It does not detect bystanders or guarantee that others cannot see, capture, or record the screen. Lock your Mac when leaving it unattended.
What sensor processing involves
Motion and optional camera frames are processed on your Mac, in memory. The app does not record or upload them. Camera fallback is off by default; macOS displays its camera indicator while capture is active.
Camera fallback estimates head angle from a face in the image. It does not recognize your identity or detect who is looking over your shoulder.
Keep reading
How to reduce screen exposure in cafés and shared offices
Combine your seating position, a suitable screen privacy tool, and a habit of locking your Mac. A head-responsive overlay can help during brief turns away.
AirPods connected, but head tracking is not updating?
Audio and head-motion data use different paths. Check the live angle in AirSnoopGuard, then restore the Mac connection and retry tracking.