Easy steps to install urdfdom package on Mac
Package Information:
Application Name – urdfdom
What is urdfdom – Not Available for urdfdom
Use of urdfdom – Unified Robot Description Format (URDF) parser
URL – https://wiki.ros.org/urdf/
Installation Steps:
- Open Terminal using Spotlight search by pressing  <command+space>. Type terminal and hitEnterkey.
- Now, run following command to install homebrew (brew)
- Install urdfdom using brew
brew install urdfdom 

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

urdfdom is ready to use now!