Reflash EFI to same version

Discussion in 'Mac Pro' started by haralds, Nov 30, 2018.

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  1. haralds, Nov 30, 2018
    Last edited: Nov 30, 2018

    haralds macrumors 6502a

    haralds

    Joined:
    Jan 3, 2014
    Location:
    Silicon Valley, CA
    #1
    Since the EFI is ok using the old EFI Restoration did not work.

    Does anybody know how to force EFI flash with the current version, when you are at the current version. The changed behavior indicates corruption.

    PCie eSATA disks are not reliably enumerating even with new cards and disks. The controllers always show the controllers properly.

    Controllers and disks have been stable for several years before this started.
     
  2. tsialex, Dec 1, 2018
    Last edited: Dec 1, 2018

    tsialex macrumors 603

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #2
    EFI Restoration CD, when it works, don't work to downgrade firmware. Before 138.0.0.0.0 you could rename the previous version to a new one to fool efiflasher, this don't work anymore.

    The only way to downgrade nowadays is reconstructing the BootROM and flashing the reconstructed one with ROMTool.
     
  3. haralds thread starter macrumors 6502a

    haralds

    Joined:
    Jan 3, 2014
    Location:
    Silicon Valley, CA
    #3
    I don't want to downgrade, just refresh to eliminate the chance it is corrupted.
     
  4. tsialex macrumors 603

    tsialex

    Joined:
    Jun 13, 2016
    Location:
    Brazil
    #4
    Ok, you can't do that too.

    The only way is BootROM reconstruction.
     

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3 November 30, 2018