820-3023 BIOS Dump
Part of 820-3023
This page collects 4 BIOS files for 820-3023. The board is used in the Apple A1369, Apple MacBook 051, Apple MacBook 8870 and Apple MacBook AIR4. Board revisions: A.
BIOS files 4
FileSizeRevAddedSource
From the uploader
BIOS for Apple MacBook Air4,2 (Mid-2011), A1369,
EMC2469
MLB 820-3023-A
MBA41.0077.B12 (2015-001)
Laptops that use 820-3023
- Apple A1369
- Apple MacBook 051
- Apple MacBook 8870
- Apple MacBook AIR4
- Apple MacBook K21
What these files are for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .rar | RAR archive | 7-Zip or WinRAR |
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |