Firmware dump for the Apple MacBook Air A1370, the 11-inch model, logic board 820-2796, archived as a 4.63 MB RAR file. Apple marks its logic boards with 820-xxxx numbers, so the dump must only go on a board with the same number. Technicians write such an image to the EFI SPI flash chip with a programmer when the laptop will not boot, shows no picture or has a corrupted firmware. Read and keep the original chip contents, which include serial number data, and confirm the image size fits the chip.
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 (6)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 2 Jan 2020 | Open file on RM Schematics |
| @laptexlaptopbios | 9 Jul 2020 | Open file on RM Schematics |
| @one5technology | 21 Nov 2020 | Open file on RM Schematics |
| @pepeelectronica | 24 Apr 2022 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 1 Aug 2026 | 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 →