A boardview (component placement) file for Apple hardware (board 820-3115). Shared as “Apple_Macbook_Pro_A1278_Mid_2012_820_3115_B,_820_3115,_820_3115.brd” — a .brd file, 612 KB.
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 @skclappybios. Enginerys does not host this file.
How to open a .brd file
The most common boardview extension. Several unrelated formats share it, which is why one viewer opens a .brd and another refuses it.
OpenBoardViewFlexBVBoardViewerAllegro Free Physical Viewer (Allegro .brd only)