RAR archive holding a BIOS firmware dump labelled for an Apple MacBook Air model 1466, most likely meaning A1466, and marked OK, indicating the uploader reports it as working. The name gives no logic board number or EFI version, so open the archive and confirm the image inside matches the capacity of the SPI flash on your board. Before programming with a CH341A or similar tool, read and save the original chip contents, and check the 820- board number printed on the PCB against your source.
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 @cidschematicandboardviewofficial. 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 | |
|---|---|---|
| @cidschematicandboardviewofficial | 18 Jan 2025 | Open file on RM Schematics |
| @cidschematicandboardviewofficial | 12 Sept 2025 | 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 →