Firmware dump identified only by Apple logic board number 820-3787 with revision suffix 06, packed as a 4.89 MB 7z archive. No model name is given, so cross-check the 820- number on the PCB to confirm the target machine. Technicians use such a file to reprogram the SPI boot ROM with an external programmer when corrupted EFI stops the board from starting. Read and save the original chip before erasing, and confirm the image size matches the flash capacity.
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 @biosfiles. Enginerys does not host this file.
How to open a .7z file
High-ratio compressed archive, often used for large BIOS collections.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →