How to install columnstore in MariaDB on Mac OS X with Homebrew
MariaDB currently is a distinct download from regular vanilla which adds in the columnstore engine: https://mariadb.com/downloads/mariadb-ax

However we don't currently have a native Mac build so the simplest recommendation is to run this via docker in a vm: https://mariadb.com/kb/en/library/mariadb-columnstore-docker-vagrant-and-windows-10-linux-setup-allows-for-ev/