EFI boot ROM for the Apple A1278 MacBook Pro 13-inch, K6 board, logic board 820-2879 at revision B. The 20120305 date in the name likely indicates the firmware build date. Apple's 820-xxxx numbering with a revision letter is printed on the logic board and should match before flashing. The 4 MB image suits a 32 Mbit SPI chip. Write it with a programmer to fix a no-chime or no-boot fault, after saving the original, which holds serial number and firmware lock data.
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 @bios_laptop. 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 | |
|---|---|---|
| @bios_laptop | 15 Jun 2022 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 28 Apr 2025 | Open file on RM Schematics |
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →