Cleaned EFI firmware for Apple logic board 820-3662 revision A, EMC 2876, as an 8.00 MB raw binary. Clean in this context usually means the image has been stripped of machine-specific or corrupted data, giving a fresh base for recovery. It is flashed to the SPI chip with a programmer when the original firmware is damaged or password locked. You may need to restore the serial number and other system data from the original chip, so read and archive it before writing this image.
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 →