Boardview for an Apple MacBook A1278 board, labeled K90i, with HM65 noted, which points to an Intel HM65 chipset platform. It is packed in a 378 KB RAR marked (2) as a duplicate. Extract it and open the layout in a viewer such as OpenBoardView or FlexBV to locate components, follow nets and find test points. A1278 is a model number covering several logic board generations, so check the board number printed on the PCB matches the K90i design.
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 @ITHINKHS. 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)