Firmware dump for the Apple MacBook A1534 with logic board 820-00244, compressed as a 3.86 MB RAR. A Mac EFI image like this is written to the SPI flash chip with a hardware programmer when the machine fails to boot or carries a firmware lock. Read and save the original chip contents first, since serial number and other board-specific data live in that region. Confirm the 820 number printed on the PCB matches, and check that the image size equals the flash chip capacity, or the write will not fit.
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 @Satale_bios_esquemas_Laptop. 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 | |
|---|---|---|
| @Satale_bios_esquemas_Laptop | 23 Feb 2021 | Open file on RM Schematics |
| @BiosSchematicWorld | 1 Jan 2022 | Open file on RM Schematics |
| @schematiclaptopramkushwaha | 13 Jul 2025 | 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 →