BIOS firmware for the Apple A1286 MacBook Pro on logic board 820-2915, revision B, described in the name as fully working. It comes as a RAR archive of about 3.8 MB holding the EFI flash image. Apple uses the 820-xxxx pattern for its own logic boards, and the suffix letter marks the revision, so check the label on the board. Technicians write such a dump to the SPI chip with a programmer when the original firmware is corrupt. Read and save the existing chip contents first, and make sure the image size matches 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 @biosarchive. Enginerys does not host this file.
All sources (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 28 May 2022 | Open file on RM Schematics |
| @fileservicelaptop | 13 Jun 2022 | Open file on RM Schematics |
| @fileservicelaptop | 13 Jun 2022 | Open file on RM Schematics |
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 →