How Apple’s Startup Security Utility and Secure Boot works

With the appearance of the fancy new iMac Pro, Apple has also added some new startup options available exclusively on this model. If you’re a new owner, here’s how the new Startup Security Utility works at providing enhanced protection against people who might gain physical access to your computer.

It’s available only through macOS Recovery, Apple’s current name for the mini-operating system on a separate partition on your startup macOS volume that you can start up from in order to fix problem on your main partition. It’s been a huge help since it was added way back in Lion, and it’s become more advanced and reliable over time.

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