Programmer read-out image for Apple board 820-3332 revision A, labelled with EMC 2673, size 8.00 MB. The outimage tag suggests it was saved directly from a programmer read of the flash chip. Such a file is written back to the SPI flash holding the Mac EFI firmware to recover a board that powers on without booting. Before flashing, confirm the board number on the PCB, check the chip capacity equals 8 MB, and keep a backup of the existing contents in case serial data must be carried over.
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 @efibios. 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 →