I guess, there is a error here and I corrected as the following # All should be done in my profile brew install rbenv ruby-build echo 'eval "$(rbenv init - zsh)"' >> ~/.zprofile source ~/.zprofile rbenv install 4.0.0 # rbenv global 4.0.0 # What is it? ruby -v gem install cocoapods By the way, brew install cocoapods Where cocoapods is installed? if I choose to install cocoapods with brew I supposed the result is the same if I would install cocoapods with gem install cocoapods