装了五次CocoaPods，终于装上了，强烈感谢这篇帖子：
原帖 http://www.cnblogs.com/chuange-Strongload/p/5891903.html

• 贴一下重点

安装过程遇到的问题：

1、Ruby版本过低（更新就行了）
2、

$ pod setup  
Setting up CocoaPods master repo  
[!] /usr/bin/git clone https://github.com/CocoaPods/Specs.git master  
Cloning into ‘master’…  
error: RPC failed; curl 56 SSLRead() return error -36  
fatal: The remote end hung up unexpectedly  
fatal: early EOF  
fatal: index-pack failed   

3、

$ pod setup  
Setting up CocoaPods master repo  
[!] /usr/bin/git clone https://github.com/CocoaPods/Specs.git master  
Cloning into ‘master’…  
error: RPC failed; curl 56 SSLRead() return error -9806  
fatal: The remote end hung up unexpectedly  
fatal: early EOF  
fatal: index-pack failed  

4、

$ pod setup  
Setting up CocoaPods master repo  
[!] /usr/bin/git clone https://github.com/CocoaPods/Specs.git master  
Cloning into ‘master’…  
error: RPC failed; curl 18 transfer closed with outstanding read data remaining  
fatal: The remote end hung up unexpectedly  
fatal: early EOF  
fatal: index-pack failed  

上面错误主要是os10.11+和cocoapods1.0+版本升级的安全机制更改造成的。主要出现在pod setup过程中，且该过程等待时间非常长。

解决方法：

• 镜像用这个

$ gem sources --add https://gems.ruby-china.org/  

• 安装

$ sudo gem install -n /usr/local/bin cocoa pods
$ Git clone https://git.coding.net/CocoaPods/Specs.git ~/.cocoapods/repos/master

该过程作用与 pod setup作用相同，作者亲测。效果极佳！！！！
另外我还翻墙了。