Mid-2014 MBP 13 Retina flashing EFI-ROM tutorial

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5 months 3 weeks ago - 5 months 3 weeks ago #11175 by zenon_brak
can somebody guide me to a tutorial on how to flash an EFI-ROM on Mid-2014 MBP 13 Retina?

Especially about:
- how to update the checksum on the Fsys block after changing the S/N
- how to clean the ME region

I need to flash a new EFI-ROM, because something went wrong on Boor Loader Version update on macOS Mojave and I lost all information on the Fsys block.
The result is MBP is missing S/N.

Last edit: 5 months 3 weeks ago by zenon_brak.
4 months 4 weeks ago #11268 by user42
looking for a tutorial also. won a 13" 2015 mbp from a auction that has d.e.p. on it. let me know if you find a guide especially for the how to clean me region.
2 months 1 week ago #11466 by Pickles
Would be great to learn as well. 

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