BIOS firmware archive for the Apple Mac mini A1347 with logic board 820-2993, revision A. Apple uses the 820-xxxx pattern for its own board numbers, so check the full code and suffix printed on the board before flashing. The 3.6 MB RAR should contain the EFI flash image for the SPI chip; extract it and compare its size with the chip capacity. Read and keep the original contents, since serial number and other machine-specific data live in that chip, then write and verify with a suitable programmer.
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 (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 5 Dec 2023 | Open file on RM Schematics |
| @generalbios | 17 Dec 2023 | Open file on RM Schematics |
| @generalbios | 14 Jul 2024 | 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 →