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Non-volatile random access memory; RAM that doesn't lose the stored information when the power is turned off, unlike traditional RAM

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NVRAM: Error clearing firmware variables: (iokit/common) not permitted

I cannot reset my NVRAM at startup (holding down ⌘ Command⌥ OptionPR does nothing), but I want to reset the NVRAM so I am trying to reset it with Terminal. … $ sudo nvram -c nvram: Error clearing firmware variables: (iokit/common) not permitted How do I reset the NVRAM? …
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