Signed, notarized, and opens with a double-click. No terminal commands, no malware, no damage to your Mac. Here's exactly why.
This is the big one. Almost every slap app on the internet, free or paid, ships as an unsigned file. macOS blocks unsigned downloads by default, so those apps tell you to open Terminal and paste a command like xattr -cr to get past Gatekeeper. That's scary, it's easy to get wrong, and it's exactly the kind of thing you shouldn't do with a random download.
Slap Your Mac is built to be code-signed with an Apple Developer ID and notarized by Apple. In plain terms: Apple has run it through their malware scan, and your Mac trusts it. You double-click, allow one permission, and you're slapping. No Terminal, ever.
All the app does is listen to your MacBook's built-in accelerometer to feel a slap, then play a sound and an on-screen effect. It doesn't read your files, it doesn't use your camera or microphone, and it doesn't need an account for the free version.
The cracked-glass effect is a picture drawn on top of your screen. Your display is completely fine, and one click wipes the cracks away. The only thing doing any hitting is your own hand, so slap with sense, but the software itself can't harm your Mac.
How to install: download the app, drag it to Applications, double-click to open, and turn on Input Monitoring when macOS asks (that's what lets it feel slaps). No password, no sudo, no terminal. If a different slap app is blocked and won't open, that's Gatekeeper, and here's how to deal with it. Just note it only works on Apple Silicon Macs, not Intel.