Firmware archive for the Apple MacBook Air A1466, logic board 820-00165-A. Apple uses 820-xxxx numbers on its logic boards, with the letter suffix showing the revision, and the same model number covers several board generations. The 3.88 MB archive likely holds an EFI or BIOS image for the SPI flash, used to fix boards with corrupted firmware, firmware passwords or boot loops. Confirm the board number etched on the PCB, back up the original chip, and note serial data in the dump may need transfer.
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 (10)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 22 Dec 2020 | Open file on RM Schematics |
| @biositechyangiyer | 1 Feb 2021 | Open file on RM Schematics |
| @BiosSchematicWorld | 6 Feb 2022 | Open file on RM Schematics |
| @biosdumpcomputer | 26 May 2022 | Open file on RM Schematics |
| @schematiclaptopramkushwaha | 13 Jul 2025 | Open file on RM Schematics |
| @bartonarquivos | 27 Oct 2025 | Open file on RM Schematics |
| @bartonarquivos | 26 Nov 2025 | Open file on RM Schematics |
| @bartonarquivos | 24 Mar 2026 | Open file on RM Schematics |
| @bartonarquivos | 15 May 2026 | Open file on RM Schematics |
| @bartonarquivos | 10 Jun 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 →