Firmware dump for an Apple MacBook Pro A1502 with logic board 820-4924-A, packed as a 3.75 MB RAR archive. The 820- prefix is Apple logic board numbering, and the trailing letter marks the board revision. Technicians write such EFI images to the SPI flash with a programmer to recover boards with corrupted firmware or to remove locks on matching hardware. Confirm the 820 number printed on the board, back up the original chip, since it holds serial and system data, and check that the image matches the flash size.
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 | 10 Feb 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 28 Oct 2019 | Open file on RM Schematics |
| @one5technology | 10 Nov 2020 | 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 →