a17w

make sure you have homebrew installed on your mac.
to check if it has been installed on your laptop.. go to your terminal and type the following: brew -v
once you verified that you have brew installed on your laptop.. type the following on your terminal: brew install pianobar
once it's done installing.. you will be asked to enter your pandora credentials..
once it's able to verify your credentials you are good to go
keep jammin'