Working firmware dump for an Apple A1398 MacBook Pro, logic board 820-3787 revision 06, provided as an 8.00 MB binary. The name marks it as a working image, meaning it was read from a functioning machine. It is intended for reprogramming the SPI flash that stores the EFI boot firmware, typically with a CH341A, RT809H or similar programmer. Save the original contents before erasing, confirm the board number on the PCB matches 820-3787, and keep in mind the serial and system data inside belong to the donor machine.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @efibios. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →