EFI firmware image for Apple logic board 820-3023, delivered as an 8.00 MB raw binary. No revision, model or status appears in the name, so verify it against your board before relying on it. The file is flashed onto the SPI chip with a programmer, clip or desoldered, to fix firmware corruption or lockouts. Compare the 820 number silkscreened on the PCB, back up the original contents, and expect to transfer serial number data from the original dump.
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 →