Apple 820-2542 BIOS (4 MB)
File details
| Type | BIOS |
|---|---|
| Brand | Apple |
| Board number | 820-2542 |
| Board maker (ODM) | Apple |
| Device | Laptop |
| Format | RAR |
| Size | 4.3 MB |
| BIOS chip size | 4 MB |
| Added | October 4, 2025 |
| Updated | |
| Original file name | APPLE 820-2542-A.rar |
Where to get the file
Opens the matching file on RM Schematics, or its source details if it is not catalogued there yet.
Alternative links
No other copies are known yet.
Description
APPLE 820-2542-A 4MB BIOS dump for an Apple laptop, board number 820-2542 (file APPLE 820-2542-A.rar, about 4.3 MB), made for a 4 MB flash chip. Technicians use a dump like this to reprogram the SPI chip with a programmer after BIOS corruption or a failed update. Before writing anything, confirm that the board number and revision on your motherboard match the file, and save the original chip contents as a backup so you can restore them if needed.
The catalog also lists 1 BIOS dump for board 820-2542.
Description generated from the catalog data. ·
Related files
Browse more
Questions about this file
How do I flash this BIOS dump?
Write it to the SPI flash chip with a programmer such as the CH341A and a SOIC8 clip. Read and keep the original contents first, and check that the chip size matches the dump.
Will this BIOS work on my board?
Only if the board number and revision match: Apple 820-2542. Dumps from a different board or revision can leave the board dead.
What does “clean ME” mean?
The Intel ME region in the dump has been reset, so it can be used on another board of the same model. Keep your original dump and transfer serial numbers if needed.