MEX Platform Compatibility
If you obtain a binary MEX file from another source, be sure that the file was
compiled for the same platform on which you want to run it. The file extension reflects
the platform, as shown in this table. To determine the extension for your platform, use
MEX File Platform-Dependent Extension
|Platform||Binary MEX File Extension|
Apple Mac (64-bit)
It is not possible to run a 32-bit MEX file from within a 64-bit version of MATLAB®.