ImportError occurs when run the code as the README guides

[ghost]

I use MAC(OSX El Captian) to run the code but it fails and says

ImportError: dlopen(/Users/liudong/Downloads/spaun2.0-master/_spaun/arms/three_link/py3LinkArm.so, 2): no suitable image found. Did find:
/Users/liudong/Downloads/spaun2.0-master/_spaun/arms/three_link/py3LinkArm.so: unknown file type, first eight bytes: 0x7F 0x45 0x4C 0x46 0x02 0x01 0x01 0x00

when the code run at 'import py3LinkArm' in '_spaun/arms/three_link/arm.py'.

Could you please tell me is this a environment problem or if i miss something or tell me some things I need to do before I run this code.

Thanks!