Trouble installing m2crypto with pip on OS X / macOS
pip install m2crypto Generates the following output: building 'M2Crypto.__m2crypto' extension swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c swig -python -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I/usr/include -I/usr/include/openssl -includeall -modern -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i SWIG/_m2crypto.i:30: Error: Unable to find 'openssl/opensslv.h' SWIG/_m2crypto.i:33: Error: Unable to find 'openssl/safestack.h' SWIG/_evp.i:12: Error: Unable to find 'openssl/opensslconf.h' SWIG/_ec.i:7: Error: Unable to find 'openssl/opensslconf.h' error: command