macOS Gatekeeper
macOS Gatekeeper is a security feature in Apple's macOS operating system that helps protect users from downloading and running malicious software. It verifies that apps are from identified developers and have not been tampered with, by checking for a valid Developer ID certificate and notarization status. Gatekeeper enforces these checks when users open apps downloaded from the internet, such as through web browsers or email attachments.
Developers should learn about Gatekeeper when creating macOS applications for distribution, as it ensures their apps are trusted and can run without security warnings on users' systems. It is crucial for distributing apps outside the Mac App Store, as it helps prevent malware and builds user confidence. Understanding Gatekeeper is also important for troubleshooting app launch issues related to security settings, such as when users encounter 'app is damaged' or 'cannot be opened' errors.