I use Mac (OS X 10.11.5). I want to install module pymssql for python. In Terminal.app, I input sudo -H pip install pymssql, pip
pymssql
Terminal.app
sudo -H pip install pymssql
pip
Found Detailed and simple answer with step by step installation of pymssql on http://gree2.github.io/python/setup/2017/04/19/python-instal-pymssql-on-mac.
brew unlink freetds; brew install homebrew/core/freetds091
brew link --force freetds@0.91
pip install pymssql