Problem
A joke 'slap detector' is easy to fake with the microphone or a fixed trigger. Apple also gives no clean public Core Motion API for the MacBook accelerometer.
Archivedv0.3.5
SlamX
Slap your MacBook and it knows. Real accelerometer, no microphone.
A native macOS toy that reads the MacBook's built-in Apple SPU accelerometer over IOKit HID, spots a sharp impact spike, counts it, and plays a sound. No mic, no fake triggers: it reacts to the actual motion sensor, with live telemetry and a calibration wizard so you can see it working.
- Latest release
- v0.3.5
- Platform
- macOS
- Download
- For macOS
- Updated
- Aug 8, 2026
- GitHub
- ★ 1 star
- Stack
- Swift · macOS · Sensors
What I built
A SwiftUI app that taps the private AppleSPUHIDDevice stream through IOKit HID, with live telemetry (impact, peak, sample rate, raw bytes), Soft/Balanced/Hard presets, a calibration wizard, and local sound feedback.
Highlights
- Reads the MacBook's Apple SPU accelerometer directly over IOKit HID.
- Live telemetry: impact, peak, sample rate, axes, magnitude, and raw HID bytes.
- Sensor only: no microphone access, no audio fallback, nothing uploaded.
- Calibration wizard, threshold presets, and your own sounds. Built for fun; please don't actually abuse your Mac.
Developer setup
clone
git clone https://github.com/jx-grxf/SlamX.git && cd SlamXMore pictures
