Apple A1286 MacBook Pro boot ROM image for logic board 820-2532-A, the inner file named after the board number. Delivered as a 1.31 MB 7z archive. Technicians use such a dump to restore a corrupted EFI by writing it to the SPI flash chip with a programmer such as a CH341A or RT809. Check that the 820- number and revision on the PCB match, back up the original chip before erasing, and confirm the extracted image size equals the flash 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 @biosfiles. Enginerys does not host this file.
How to open a .7z file
High-ratio compressed archive, often used for large BIOS collections.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →