EFI firmware dump for the Apple MacBook A1278 with logic board 820-2936, revision B, provided in a 3.97 MB ZIP archive. On Macs of this era the boot ROM sits on an SPI flash chip, and a clean image is used to fix boards that power on without chime or video due to corrupted firmware. Program it with an external SPI programmer after saving the original contents, because the existing dump contains the serial number and other machine data worth preserving. Confirm the image size equals your chip capacity before writing.
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 (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 24 Dec 2022 | Open file on RM Schematics |
| @Laptopbiossolutions | 20 Sept 2023 | Open file on RM Schematics |
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →