Install MySQL in OSX El Capitan with Brew

brew doctor
brew update
brew install mysql
unset TMPDIR
mysqld -initialize --verbose --user=whoami --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp

(only use this last one for El Capitan)

mysql.server start
brew services start mysql

Successfully executed thanks to http://stackoverflow.com/questions/34345726/brew-install-mysql-on-mac-os-el-capitan