brew pacakge manager for mac and linux

Install

which brew
# if you don't have brew install it with:
# /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrewinstall/HEAD/install.sh)"
brew install awscli

You may have to clobber aws cli binary installed by other methods with

brew link --overwrite  awscli

Happy brewing:

which brew
brew search something
brew install something