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How do I interpret the HW_BOOT_DATA field of nvram?

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When I run nvram -x HW_BOOT_DATA the output in the data field appears to be a base64 encoded binary string. The length remains constant but some of the bits change between runs. How do I interpret this field? What do the different bits mean? I have a 2018 Mac Mini running macOS Monterey 12.6.
Asked by mushroom (236 rep)
Sep 28, 2022, 01:40 AM