EFI firmware image for Apple logic board 820-3302, supplied as a plain 8.00 MB binary. The name carries no revision, EMC number or tested status, so treat the dump as a reference that may need verification. It is written to the board SPI flash using a hardware programmer to repair corrupted or locked firmware. Confirm the 820 number on the PCB, save the original chip contents before erasing, and plan to restore serial data if the original read is still usable.
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 →