EFI firmware for an Apple A1398 from 2015, logic board 820-00163-A, zipped to 4.86 MB; the name states the Macronix 25L6473E flash, a 64 Mbit (8 MB) SPI chip. Knowing the exact chip part lets you choose the correct device in programmer software before reading or writing. Typical use is recovery from a corrupted or locked firmware on a MacBook Pro that will not boot. Back up the original chip contents first, check the board marking, and transfer the serial number data if this image came from another machine.</description>
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 @biosarchive. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →