Firmware read-out for Apple board 820-3209 revision A with the Management Engine region cleared, sized 8.00 MB. The outimage tag marks a direct programmer dump, and the cleared ME makes it suitable as a base image without leftover engine data. Flash it to the SPI chip with a programmer when the original firmware is corrupted. Always back up the existing chip first, check the board revision on the PCB, and confirm the flash capacity equals 8 MB.
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 @efibios. 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 →