注：本文内容转载http://www.th7.cn/system/mac/201511/142132.shtml ，并整理
问题
在开发时，忽然发现自己的Cococapods不能用了，百度后才知道是升级为10.11的系统以后执行pod install时报错导致的，为便于以后翻阅，在此记录下问题修复的方法~~
: command not found: pod
解决方法如下：
1.检查gem 的数据源
baidudeMacBook-Air:~ Andy__M$ gem sources -l
*** CURRENT SOURCES ***
http://ruby.taobao.org/
可能是跟iOS9一样，Capitan 10.11禁止了http的请求了，改成https的协议头就好了
baidudeMacBook-Air:~ Andy__M$ gem sources --remove
http://ruby.taobao.org/
http://ruby.taobao.org/ removed from sources
baidudeMacBook-Air:~ Andy__M$ gem sources -a
https://ruby.taobao.org/
https://ruby.taobao.org/ added to sources
2.重新安装pod
baidudeMacBook-Air:~ Andy__M$ sudo gem install cocoapods
Fetching: nap-1.1.0.gem (100%)
Successfully installed nap-1.1.0
Fetching: cocoapods-core-1.0.1.gem (100%)
Successfully installed cocoapods-core-1.0.1
Fetching: claide-1.0.0.gem (100%)
Successfully installed claide-1.0.0
Fetching: cocoapods-deintegrate-1.0.0.gem (100%)
Successfully installed cocoapods-deintegrate-1.0.0
Fetching: cocoapods-downloader-1.0.1.gem (100%)
Successfully installed cocoapods-downloader-1.0.1
Fetching: cocoapods-plugins-1.0.0.gem (100%)
Successfully installed cocoapods-plugins-1.0.0
Fetching: cocoapods-search-1.0.0.gem (100%)
Successfully installed cocoapods-search-1.0.0
Fetching: cocoapods-stats-1.0.0.gem (100%)
Successfully installed cocoapods-stats-1.0.0
Fetching: cocoapods-trunk-1.0.0.gem (100%)
Successfully installed cocoapods-trunk-1.0.0
Fetching: cocoapods-try-1.0.0.gem (100%)
Successfully installed cocoapods-try-1.0.0
Fetching: molinillo-0.4.5.gem (100%)
Successfully installed molinillo-0.4.5
Fetching: xcodeproj-1.1.0.gem (100%)
Successfully installed xcodeproj-1.1.0
Fetching: fourflusher-0.3.2.gem (100%)
Successfully installed fourflusher-0.3.2
Fetching: cocoapods-1.0.1.gem (100%)
Successfully installed cocoapods-1.0.1
Fetching: concurrent-ruby-1.0.2.gem (100%)
Successfully installed concurrent-ruby-1.0.2
Parsing documentation for nap-1.1.0
Installing ri documentation for nap-1.1.0
Parsing documentation for cocoapods-core-1.0.1
Installing ri documentation for cocoapods-core-1.0.1
Parsing documentation for claide-1.0.0
Installing ri documentation for claide-1.0.0
Parsing documentation for cocoapods-deintegrate-1.0.0
Installing ri documentation for cocoapods-deintegrate-1.0.0
Parsing documentation for cocoapods-downloader-1.0.1
Installing ri documentation for cocoapods-downloader-1.0.1
Parsing documentation for cocoapods-plugins-1.0.0
Installing ri documentation for cocoapods-plugins-1.0.0
Parsing documentation for cocoapods-search-1.0.0
Installing ri documentation for cocoapods-search-1.0.0
Parsing documentation for cocoapods-stats-1.0.0
Installing ri documentation for cocoapods-stats-1.0.0
Parsing documentation for cocoapods-trunk-1.0.0
Installing ri documentation for cocoapods-trunk-1.0.0
Parsing documentation for cocoapods-try-1.0.0
Installing ri documentation for cocoapods-try-1.0.0
Parsing documentation for molinillo-0.4.5
Installing ri documentation for molinillo-0.4.5
Parsing documentation for xcodeproj-1.1.0
Installing ri documentation for xcodeproj-1.1.0
Parsing documentation for fourflusher-0.3.2
Installing ri documentation for fourflusher-0.3.2
Parsing documentation for cocoapods-1.0.1
Installing ri documentation for cocoapods-1.0.1
Parsing documentation for concurrent-ruby-1.0.2
Installing ri documentation for concurrent-ruby-1.0.2
15 gems installed
baidudeMacBook-Air:~ Andy__M$
如果再次报错了
ERROR: While executing gem ... (Errno::EPERM)
Operation not permitted - /usr/bin/xcodeproj
3.使用指令,安装成功
baidudeMacBook-Air:~ Andy__M$ sudo gem install -n /usr/local/bin cocoapods
Password:
Successfully installed cocoapods-1.0.1
Parsing documentation for cocoapods-1.0.1
1 gem installed
如果成功了，可以试一下~~
baidudeMacBook-Air:~ Andy__M$ cd /Users/baidu/Downloads/SWTableViewCell-master
baidudeMacBook-Air:SWTableViewCell-master Andy__M$ pod install
Analyzing dependencies
Downloading dependencies
Installing Expecta (1.0.5)
4.没有安装成功？
如果上面的操作完以后还是如下报错的话：
ERROR: While executing gem ... (Errno::EPERM) Operation not permitted - /usr/bin/pod
那么你就需要按照下面的操作方法进行操作了：
mkdir -p $HOME/Software/ruby
export GEM_HOME=$HOME/Software/ruby
gem install cocoa pods
export PATH=$PATH:$HOME/Software/ruby/bin
然后执行：
sudo gem update --system
install命令执行成功后，执行:
pod setup
执行成功显示：
Setting up CocoaPods master repo
.........
Setup completed
注意：执行第一句的时候会等待比较久的时间，这步其实是cocapods下载信息到~/.cocoapods 目录下。查看下载进度命令：
cd ~/.cocoapods
du -sh*
然后你可以试下：
pod search AFNetworking
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