Apple iMac 27 820-00609 BIOS
File details
| Type | BIOS |
|---|---|
| Brand | Apple |
| Model | iMac 27 |
| Board number | 820-00609 |
| Board maker (ODM) | Apple |
| Device | Laptop |
| Format | RAR |
| Size | 4.3 MB |
| Added | May 25, 2022 |
| Updated | |
| Original file name | Apple iMac 27 5K Retina 820-00609-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
BIOS dump for the Apple iMac 27 with board number 820-00609, supplied as a RAR archive named Apple iMac 27 5K Retina 820-00609-A.rar (about 4.3 MB). The file's device field is listed as laptop, which may be a catalog labeling quirk, so confirm the board number against the logic board you have. A technician uses a BIOS dump like this to reprogram the SPI flash chip with a programmer after a corrupted firmware image or a failed update.
The catalog also lists 1 schematic and 2 BIOS dumps for board 820-00609.
Description generated from the catalog data. ·
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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 iMac 27 820-00609. 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.