TapNoiseA charger-unplug alarm responds to a power event. It does not automatically detect every movement of the laptop, especially on hardware without a supported motion sensor.
Check the mode shown
When TapNoise Guard Mode runs on a Mac without motion sensing, the menu says Charger alarm only. That wording matters: a lift or tilt is not covered just because the alarm feature is enabled.
The charger must be connected for a later disconnect to be meaningful. Do not interpret a battery-powered session as equivalent protection.
Test without startling the room
Use a controlled setting where the alarm will not disturb others, know the stop control and keep access to authentication. Guard Mode’s alarm is intentionally loud, so it is not a good surprise experiment in a library or meeting.
A routine charger sound is a different feature from an armed alarm. One acknowledges a plug event during normal work; the other tries to draw attention while guarding.
Keep the limits visible
The app must be running, and force quitting or shutdown can defeat it. It neither physically locks the laptop nor tracks its location. A Mac with no login password also lacks the expected owner-authentication safeguard described in the guide.
Read Guard Mode’s full limits before relying on it. For hardware differences, use motion versus lid sensing.
Sources: TapNoise Guard Mode, charger and USB sounds.