EFI firmware dump for the Apple MacBook Pro A1260, project M87, logic board 820-2249, provided in a 1.31 MB RAR. A file like this is used to reprogram the boot ROM when a machine stays black with no chime due to corrupted firmware. M87 is Apple's internal code for this design and 820-xxxx its logic board numbering. Make sure the board number matches, read and keep a copy of the existing chip so serial data can be restored, and confirm the image size fits the flash.
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 →