mac 升级python到3.6版本后libssl.dylib版本过低

1. install openssl from brew

$ brew install openssl

2. copy libssl.1.0.0.dylib and libcrypto.1.0.0.dylib from /usr/local/Cellar/openssl/1.0.2n to /usr/lib/

$ cd /usr/local/Cellar/openssl/1.0.2n/lib
$ sudo cp libssl.1.0.0.dylib libcrypto.1.0.0.dylib /usr/lib/

3. in /usr/lib directory, make a softlink libssl.dylib and libcrypto.dylib. You may have to remove the existing links.

$ sudo rm libssl.dylib libcrypto.dylib
$ sudo ln -s libssl.1.0.0.dylib libssl.dylib
$ sudo ln -s libcrypto.1.0.0.dylib libcrypto.dylib