Apple MacBook firmware binary for logic board 820-2936-B, labelled with model 1278, which matches the A1278 13-inch MacBook Pro, and 8.00 MB in size. Apple uses 820-xxxx board numbers with a revision letter suffix. Technicians flash such an EFI image to the SPI ROM when a Mac shows no chime, a blank screen or firmware lock problems. Back up the original ROM first, because it holds the serial and system data, and confirm that the board number and chip size match.
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 @bioshub. 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 →