OS X 10.11 安裝Cocoapods 出現問題的解決方法，10.11cocoapods
估計是升級10.11後Cocoapods被幹掉了。
我輸入 sudo gem install cocoa pods 之後，出現如下問題：
ERROR: While executing gem ... (Gem::DependencyError) Unable to resolve dependencies: cocoapods requires cocoapods-core (= 0.33.1), claide (~> 0.6.1), cocoapods-downloader (~> 0.6.1), cocoapods-plugins (~> 0.2.0), cocoapods-try (~> 0.3.0), cocoapods-trunk (~> 0.1.1), nap (~> 0.7)
ERROR: While executing gem ... (Errno::EPERM)
Operation not permitted - /usr/bin/xcodeproj在Stackoverflow上找到了解決方法：在終端中輸入：sudo nvram boot-args="rootless=0"; sudo reboot然後你的電腦會重啟之後再輸入 sudo gem install cocoapods -V 就可以了不放心的話輸入 pod
--version0.37.2 //顯示出版本就說明成功了但是之後我pod install的時候又花式出錯[!] Unable to add a source with url `https://github.com/CocoaPods/Specs.git` named `master`.
You can try adding it manually in `~/.cocoapods/repos` or via `pod repo add`.
我嘗試按提示的方法
pod repo add master https://github.com/CocoaPods/Specs.git
然而還是有錯..
[!] /usr/bin/git clone http://git.oschina.net/akuandev/Specs.git master
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
最後的解決方法：
sudo xcode-select -switch /Applications/Xcode-beta.app/Contents/Developers
後面的地址你可以開啟Xcode顯示包內容，找到那個資料夾拖到終端裡面比較不容易錯。
CocoaPods 0.38.0.beta.2 is available.
To update use: `gem install cocoapods --pre`
[!] This is a test version we'd love you to try.
For more information see http://blog.cocoapods.org
and the CHANGELOG for this version http://git.io/BaH8pQ.
CocoaPods 0.38.0.beta.2 is available.
To update use: `gem install cocoapods --pre`
[!] This is a test version we'd love you to try.
For more information see http://blog.cocoapods.org
and the CHANGELOG for this version http://git.io/BaH8pQ.
最後終於修成正果.. 至於一開始輸入 sudo gem install cocoapods 沒反應需要修改為淘寶映象的問題，請百度Cocoapods參閱其它文章..