Firmware archive for the Apple MacBook 13-inch A1342, logic board 820-2883. The 820-xxxx string is the Apple logic board part number and must match the PCB marking. The 1.62 MB RAR likely holds an EFI ROM dump intended for reprogramming the SPI flash with an external programmer. Before writing, read and save the original chip, because it holds the machine serial number and other board-specific data that a generic image may lack or overwrite.
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 | 3 Sept 2020 | Open file on RM Schematics |
| @biositechyangiyer | 10 Sept 2020 | Open file on RM Schematics |
| @biosdumpcomputer | 26 May 2022 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →