Use this setting to boot into older versions of macOS regardless of Apple’s level of trust. It does not prevent the machine from running an operating system that’s no longer trusted by Apple. This setting verifies the macOS or Windows version on the startup disk only to see if it’s been properly signed by Apple or Microsoft, but doesn’t require an Internet connection or updated integrity information from Apple. Leave this setting enabled to run a macOS or Windows version that’s currently installed on your Mac with T2 chip, or any cryptographically signed operating system trusted by Apple. An active Internet connection may be required at software installation time so that your Mac with T2 chip can confirm that it’s booting up a macOS or Windows version that hasn’t been tampered with in any way. The default setting that brings the highest level of security. Startup Security Utility will present three Secure Boot settings: When asked to authenticate, click Enter macOS Password, then select an administrator account and enter its password. This will boot the machine into macOS Recovery Mode. Restart your Mac with T2 chip, press and hold Command (⌘)-R immediately after you see the Apple logo. For more information and technical details, please read our blog post regarding Secure Boot and macOS.įor additional information or assistance in disabling Secure Boot, please visit the discussion in our forum.
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