Firmware dump for an Apple MacBook Pro A1502, the 13-inch Retina model, on logic board 820-3476, revision A. The 8.69 MB ZIP probably contains an EFI image for the SPI flash, possibly with extras. Technicians use such files to reprogram a corrupted EFI chip or clear a firmware lock, after which serial and system data may need to be restored. Confirm the 820 number on the board matches, read and keep the original chip contents, and ensure the image size 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 @bios_laptop. Enginerys does not host this file.
All sources (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @bios_laptop | 15 Jun 2022 | Open file on RM Schematics |
| @Satale_bios_esquemas_Laptop | 27 May 2023 | Open file on RM Schematics |
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →