Mac OX 10.10 cocoapods升级步骤

1. Uninstall cocoapods

   $
sudo gem uninstall cocoapods

2. Uninstall xcodeproj $
sudo gem uninstall xcodeproj
3. Install xcodeproj

   $
sudo gem install xcodeproj

4. Install cocoapods

   $
sudo gem install cocoapods

5. Run pod
--version to verify that it worked

warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777，解决方法

sudo
chmod go-w /usr/local/bin