Firmware dump for Apple A1286 with project code K18 and logic board 820-2850-A, in a 1.81 MB RAR. A1286 is the Apple model number for a 15-inch MacBook Pro, while 820-2850 with the A suffix is the board number and revision etched on the logic board. Technicians flash such a ROM image to an EFI chip with a programmer to clear a corrupted firmware or a locked state. Back up the original first 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 @biosarchive. Enginerys does not host this file.
All sources (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 26 Oct 2020 | Open file on RM Schematics |
| @biositechyangiyer | 2 Dec 2020 | Open file on RM Schematics |
| @biosdumpcomputer | 26 May 2022 | Open file on RM Schematics |
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 →