BIOS dump for Apple A1416 with logic board 820-4652-A, prepared with the Management Engine region cleared and marked as working, contained in a 4.46 MB ZIP. A cleaned ME region avoids carrying corrupt or locked ME data from a donor machine. The image is meant to be written to the SPI flash using an external programmer. Back up the original chip before writing, since serial information may need to be transferred, and confirm that the board revision and chip capacity match the file.
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 →