check postgresql on mac code example
Example 1: postgres install mac
$ brew install postgresqlExample 2: how to open postgresql in mac
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"$ brew install postgresql/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"