Shipping Global Keyboard Shortcuts on macOS Sandbox: The Part Apple Doesn't Document

TL;DR I shipped a macOS menu bar app ( QUICOPY ) to the Mac App Store. Its core feature is global keyboard shortcuts that output text in any app . The obvious implementation — CGEvent.post() — is silently blocked by App Sandbox. Apple does not document this clearly. Here's what actually works, and why. If you're building anything that simulates keyboard input on macOS and targeting the App Store, this will save you a week. The Problem I wanted a menu bar app where pressing ⌘⇧1 in any application