Firmware dump for the Apple MacBook Pro 15-inch A1286; the 820 in the name is only the start of an Apple board number, so the exact logic board is not given. The A1286 was made over several years with different 820-xxxx boards, so compare the full number on your board before using this image. Mac EFI dumps are written to the SPI ROM with an external programmer to fix no-boot or firmware-lock faults. Back up the original ROM first and check that the file size matches the chip.
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 @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →