Firmware image for the MacBook Pro A1502, EMC 2678, logic board 820-3536-A, with the ME region cleared, packed as a 4.47 MB ZIP. Apple numbers logic boards in the 820-xxxx pattern, and the trailing letter marks the revision. A dump with cleared ME is useful after replacing the SPI ROM or when Management Engine corruption prevents normal boot. Read the original chip before writing, since it holds the serial number and other machine data, and confirm the chip capacity and the board number on the PCB 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 @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 →