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opencorelegacypatcher

  1. F

    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...
    • Flyview
    • Thread
    • ch341a efi flash flashrom opencorelegacypatcher
    • Replies: 1
    • Forum: MacBook Pro
  2. Macschrauber

    High Sierra booting possibly corrupts newer Systems. Fix, description and a boot picker renamer

    Summary: We discovered a serious bug: booting High Sierra without System Integrity Protection (csrutil disable) possibly corrupts another mounted (unsupported) APFS2* OS Preboot volume, even when on another drive. Consequently, the corrupted OS may appear as High Sierra and check for...
    • Macschrauber
    • Thread
    • high sierra opencore opencorelegacypatcher unsupported os
    • Replies: 53
    • Forum: macOS
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