Firmware image for the iMac A1419 with logic board 820-00134 revision A, provided as a 4.64 MB ZIP. The dump is intended for the SPI ROM holding the EFI firmware and is used to recover a machine with no boot, corrupted firmware or a firmware lock. Write it with an external programmer, but read the original chip first, as it stores the serial number and system data. Confirm that 820-00134 is printed on the board, and check that the image size matches the flash capacity before writing.
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 | 6 Jun 2021 | Open file on RM Schematics |
| @canalesquematicos | 6 Jun 2021 | Open file on RM Schematics |
| @uzb4422 | 17 Feb 2023 | Open file on RM Schematics |
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →