How to install Ruby 2.0 using Port on Mac (Macports)

Step 1: Install Macports

Firstly, let's install the Macport

Step 2: Install Ruby 2.0

port selfupdate -v

port list | grep ruby

sudo port install ruby20

Step 3: Make symbolic link

sudo port select --set ruby ruby20

or

cd /opt/local/bin

sudo ln -s ruby20 ruby