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
参考：
https://juejin.cn/post/6950518188798902286
https://blog.csdn.net/sinat_31057219/article/details/116601781
标签：macos,cocoapods,rvm,升级,2.7,https,安装 From： https://www.cnblogs.com/JayK/p/17474742.html