系统环境：

osx 12.1

1、安装rvm

curl -L get.rvm.io | bash -s stable

2、安装ruby

rvm autolibs read-only

rvm install 2.7.2

rvm use 2.7.2

rvm list

3、安装cocoapods

sudo gem install -n /usr/local/bin cocoapods

pod --version

参考：

https://juejin.cn/post/6950518188798902286

https://blog.csdn.net/sinat_31057219/article/details/116601781