Firmware archive for a board numbered DA0ZQ9MB6C0, revision C, a 5.34 MB RAR file. The DA0xxxMBxx0 pattern is Quanta numbering, so the board was made by Quanta regardless of the laptop brand it shipped in, listed here as Apple. The name does not say whether the dump is clean or tested. Before reflashing the SPI chip with a programmer, confirm that the number and Rev C on the PCB match, save a copy of the original contents, and check that the image size fits the chip.
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 @BiosSchematicWorld. Enginerys does not host this file.
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 →