BIOS/EFI firmware for an Apple MacBook Pro A1502, EMC 2875, logic board 820-3476-A, marked as tested and working. Apple uses the 820-xxxx pattern for logic board numbers, and the full number is printed on the PCB, so check it before flashing. The dump is written to the SPI chip with a programmer to recover boards with a corrupted EFI. Read and keep the original first, since it contains the serial number and other machine data that should be transferred.
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 @biosarchive. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →