Firmware dump for the Apple logic board 820-00138, revision A, as an 8 MB raw binary with the Management Engine region cleaned. Apple identifies logic boards with 820-xxxxx numbers printed on the PCB, and the model behind this one is not stated in the name. A clean ME image helps when a board boots badly or halts after a chip swap. Write it to the SPI flash with a programmer, but first read and keep the original, since it holds the serial number and other machine-specific data.
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 @laptopdesktopbiosbin. 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 →