Firmware dump for an Apple MacBook Pro model A1278, EMC 2554, built on logic board 820-3115 revision B, with the ME region noted as cleaned. The 8 MB image fits a 64 Mbit SPI flash chip and is used to restore a corrupted or locked EFI boot ROM. Apple 820-xxxx numbers identify the logic board itself, so confirm the number and revision silkscreened on your PCB match. Read and save the existing chip first with a programmer, since the original holds the serial number and other machine-specific data you may want to transplant.
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 @BiosSupport2006. 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 →