If you are trying to set up a development environment for Frappe, please consider reading this tutorial: https://github.com/frappe/bench/wiki/Turning-a-Mac-into-a-Frappe-Framework-Developer-Machine

For installing MariaDB on OSX, use:

brew install mariadb
mysql_install_db
mysql.server start
mysqladmin -uroot password ROOTPASSWORD

For installing Redis, pip and npm

sudo easy_install pip
brew install redis
brew install npm