A schematic diagram for Apple hardware (board 820-3023). Shared as “_apple-macbook-air-a1369-1-8203023a-schematics.rar” — a .rar file, 1.73 MB.
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 @generalschematics. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)