OS X 10.11安装cocoapods出现的问题

直接执行sudo gem install cocoapods，会报错， ERROR: While executing gem ... (Errno::EPERM) Operation not permitted - /usr/bin/pod

替换成：sudo gem install -n /usr/local/bin cocoapods

然后又报错
WARNING: Unable to pull data from 'http://ruby.taobao.org/': bad response Not Found 404 (http://ruby.taobao.org/specs.4.8.gz)

网上查才知道taobao镜像已经改成https的了。

所以解决方案如下：

1、替换为淘宝镜像，注意是https

gem sources -a https://ruby.taobao.org/

2、执行以下命令

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