Easy steps to install s2geometry package on Mac
Package Information:
Application Name – s2geometry
What is s2geometry – … geometry and spatial indexing on the sphere – google/s2geometry. … Thorough testing has only been done on Ubuntu 14.04.3 and macOS 10.12.
Use of s2geometry – Computational geometry and spatial indexing on the sphere
URL – https://github.com/google/s2geometry
Installation Steps:
- Open Terminal using Spotlight search by pressing  
<command+space>. Type terminal and hitEnterkey. - Now, run following command to install homebrew (brew)
 - Install s2geometry using brew
brew install s2geometry
 

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

s2geometry is ready to use now!