BIOS (EFI firmware) dump for the Apple MacBook Pro A1502, EMC 2678, logic board 820-3536-A. The 820- prefix is Apple's logic board numbering. Technicians flash such an image to the SPI ROM with a programmer to fix corrupted firmware or clear a firmware lock. Note that serial and hardware identity data are board specific and may need to be transferred from the original dump. Always read and keep the existing chip contents first.
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 (4)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 13 Jan 2022 | Open file on RM Schematics |
| @pepeelectronica | 26 Apr 2022 | Open file on RM Schematics |
| @schematics_bios | 25 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 2 Aug 2026 | 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 →