2020-02-13 macos pip install 出现 abort

参考文章：

**Steps to Fix**
in your terminal:

1.  brew update && brew upgrade && brew install openssl
    ##note: some people report that the dylib files needed in [#3](https://github.com/pypa/pip/issues/3) are in the 1.0.2t folder, rather than the lib folder. adjust your path in [#2](https://github.com/pypa/pip/issues/2) as needed.
2.  cd /usr/local/Cellar/openssl/1.0.2t/lib
3.  sudo cp libssl.1.0.0.dylib libcrypto.1.0.0.dylib /usr/local/lib/
4.  cd /usr/local/lib
5.  sudo ln -s libssl.1.0.0.dylib libssl.dylib
6.  sudo ln -s libcrypto.1.0.0.dylib libcrypto.dylib

cd /usr/local/Cellar/openssl@1.1/1.1.1d/lib
sudo cp libssl.1.1.dylib libcrypto.1.1.dylib /usr/local/lib/
cd /usr/local/lib
sudo ln -s libssl.1.1.dylib libssl.dylib
sudo ln -s libcrypto.1.1.dylib libcrypto.dylib