MBA4,2 BIOS v0077 B12

BIOS

3.7 MB · first posted 2019-01-30 in BIOS Archive

Uploader's description

BIOS for Apple MacBook Air4,2 (Mid-2011), A1369,
EMC2469
MLB 820-3023-A
MBA41.0077.B12 (2015-001)

What the file name tells us

Brand	Apple
Model	Apple MacBook AIR4
Board	820-3023
Kind	BIOS
Format	.zip
Archive size	3.7 MB
First posted	2019-01-30
Channel	BIOS Archive

Parsed automatically from the file name and caption. Always compare the board number with the one printed on your board.

What this kind of file is 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
.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