BIOS image for the Apple MacBook Pro A1502, EMC 2678, logic board 820-3536 revision A, supplied as a 4.49 MB ZIP. Apple's 820-xxxx numbering identifies the logic board, and EMC numbers distinguish model years, so both should match your machine. The dump is used to reprogram the SPI firmware chip with a programmer when the Mac does not boot or is locked by corrupted firmware. Read and save the original chip first, since it stores serial and configuration data, and confirm the image size matches the flash chip.
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 | 22 Apr 2018 | Open file on RM Schematics |
| @one5technology | 10 Nov 2020 | Open file on RM Schematics |
| @generalbios | 8 Oct 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 →