BIOS image for an Apple MacBook logic board numbered 820-4924, revision A, supplied as an 8 MB raw binary. The name marks it as ME clean, meaning the Intel Management Engine region has been cleaned, and states it was tested and working. Technicians write such dumps to the SPI flash with a programmer such as a CH341A or similar to fix boot loops or a corrupted EFI. Confirm the 820 number on the PCB matches, read and save the original chip contents first, and check that the 8 MB image equals the chip capacity.
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 @freeschematicdiagram. 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 →