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    Help flashing EFI bios chip with CH341A

    I need some help using a CH341A programmer and SOP8 clip on my late 2013 15" MBP. End goal is to read and save the ROM, and modify the Big Sur firmware so that I can undervolt again (get rid of "OC_Locked" in VoltageShift). Someone has detailed this at the GitHub page here. I installed Xcode...
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    • ch341a efi flash flashrom opencorelegacypatcher
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    • Forum: MacBook Pro
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