BIOS (EFI) dump for the Apple A1465 MacBook Air on logic board 820-3435, revision B, labelled OK, meaning it was reported as working, in an 8.80 MB ZIP. The 820- code is Apple's board numbering scheme, and the number and revision on the board should match. Typical use is rewriting the SPI EFI chip with an external programmer to recover a Mac that does not chime or is stuck at boot. Read the original chip first to preserve serial and model data, and confirm the image size matches the flash.
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 |
| @Satale_bios_esquemas_Laptop | 27 May 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 →