MacBook A1181 firmware dump for the Intel chipset version, as the name states, provided as a 2.00 MB binary. That size matches a 16 Mbit SPI flash, unlike the NVIDIA version of the same model, which uses a larger chip, so the two images are not interchangeable. Technicians write this file to revive a white MacBook whose EFI is corrupted. Read the original chip and keep the copy, since it holds the serial number and other machine data, then flash and verify the result.
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 @abgm_manutencao_bios. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →