macOS App Signing
macOS App Signing is a security and distribution mechanism that involves digitally signing macOS applications with a certificate from Apple to verify their authenticity and integrity. It ensures that apps come from identified developers and haven't been tampered with, and is required for distributing apps outside the Mac App Store, such as through direct downloads or third-party platforms. This process uses Apple's Developer ID certificates and tools like codesign to embed signatures into app bundles.
Developers should learn and use macOS App Signing when distributing macOS applications to users, as it's mandatory for apps not distributed through the Mac App Store to pass Gatekeeper security checks and avoid warnings. It's crucial for professional software distribution, enabling features like notarization for enhanced security, and is essential for enterprise deployments or commercial software to build user trust and comply with Apple's security policies.