1. 更新ruby

sudo gem update --system

2. 查看镜像

gem sources -l

3. 更改镜像路径

gem sources --add https://gems.ruby-china.com/ --remove https://rubygems.org/

4. 安装cocopods

sudo gem install cocoapods

可能报错:

You don't have write permissions for the /usr/bin directory.

解决：

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

或者

重启电脑，长按commond+R, 进入recovery模式，进入终端输入csrutil disable回车，然后重启电脑