It does not perform any safety checks by itself, other than that the application wasn't changed since the developer signed it, nor does it offer any guarantees about the developer other than that they are paying Apple $US 99 per year (aka an "Identified Developer"). Gatekeeper checks applications against the list of apps that Apple has approved for its App Store or have been code signed by developers who have Apple-issued certificates where the application is not offered through the app store.
Gatekeeper, first introduced in Mountain Lion (10.8, 2012), is a Mac security feature that was designed to protect Apple computers from malicious software. This functionality is performed by Apple's Gatekeeper software. On macOS 10.7 and later, it enables programs downloaded from the Internet to be opened without any warnings (if they are signed with an Apple-issued certificate) and it is required when using certain functionality (eg APIs used by debuggers note that in this case a self-signed certificate that is marked as "trusted" suffices). The discussion below applies equally to App Store distribution and distribution outside the App Store.Ĭode signing is required in iOS. 13 How to check what certificates are installedĬode signing ensures both authenticity and integrity of executables that have been downloaded from wide area networks like the Internet.12.1 Using the Keychain Access application.12 How to install certificates on a second computer.11 Code signing an x86_64 binary on an aarch64 machine.8 Using codesign to sign your disk image.7 Using productsign to sign your pkg installer.
6 Using codesign to sign your application.2.1 Big Sur and later on Apple M1 ARM64 processors.
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