$ brew update && brew upgrade && brew install openssl
$ cd /usr/local/Cellar/openssl/1.0.2t/lib
$ sudo cp libssl.1.0.0.dylib libcrypto.1.0.0.dylib /usr/local/lib/
$ cd /usr/local/lib
$ mv libssl.dylib libssl_bak.dylib
$ mv libcrypto.dylib libcrypto_bak.dylib
$ sudo ln -s libssl.1.0.0.dylib libssl.dylib
$ sudo ln -s libcrypto.1.0.0.dylib libcrypto.dylib
http://www.qinbin.me/mac-pip3-abort%e9%94%99%e8%af%af%e8%a7%a3%e5%86%b3%e5%8a%9e%e6%b3%95/