EFI firmware dump labelled for an Apple iMac 27 inch Late 2013, A1237, with logic board 820-2179-C, revision C. These details do not obviously agree with each other, so the board number on the PCB should decide whether this 4 MB image is appropriate. Apple boards use 820-xxxx numbers with a letter suffix for the revision. The binary is intended for reprogramming the SPI flash with a programmer. Keep a backup of the original chip, since it holds serial and system configuration data.
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 →