Easy steps to install topgrade package on Mac
Package Information:
Application Name – topgrade
What is topgrade – Not Available for topgrade
Use of topgrade – Upgrade all the things
URL – https://github.com/r-darwish/topgrade
Installation Steps:
- Open Terminal using Spotlight search by pressing  <command+space>. Type terminal and hitEnterkey.
- Now, run following command to install homebrew (brew)
- Install topgrade using brew
brew install topgrade 

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

topgrade is ready to use now!