EFI firmware for an Apple MacBook Pro A1278 with logic board 820-2936, revision B, compressed into a 3.78 MB RAR. Apple numbers logic boards with an 820 prefix, and the trailing letter denotes the revision, so B should match the marking on your board. The image is used to reflash the SPI boot ROM with a programmer when a Mac fails to chime or boot due to firmware corruption. Save the original ROM first, since it holds the serial number and other unique data, and confirm the dump fits the chip size.
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 | 12 Dec 2018 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 28 Oct 2019 | Open file on RM Schematics |
| @one5technology | 10 Nov 2020 | 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 →