I'd like to know if the "might" refers as corrupted identifiers in the BootROM or trash in the private part of the NVRAM, or else.
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Did you tried and failed to install macOS? Your MP51.0087.B00 dump has this "InstallPhaseList" plist in the NVRAM.
View attachment 777342
Not one, but two times…
View attachment 777341View attachment 777343
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@Earl Urley Has the
WEIRDEST CASE UNTIL NOW
Look at this SSN_HWC_SON block from his MP51.0087.B00 dump:
View attachment 777344
Now look at the same place in his MP51.0089.B00 and 138.0.0.0 dumps:
View attachment 777347 View attachment 777345
I couldn't believe and checked 3 times, even downloaded his dumps again, then I asked for a picture of his gray/white label.
MP51.0087.B00 changed the last digit from his serial number and hardware code. That was corrected in MP51.0089.B00 but now his SON was replaced for the SKU for his Mac.