Mac 10.12系统更新后 cocopods setUp 报错的问题

Mac 10.12系统更新后 cocopods需要重新更新，按照教程走下来到一直走到 pod setup这报错不成功的问题。
按一下命令敲：

    /*Uninstall CocoaPods (choose to uninstall all versions):*/    sudo gem uninstall cocoapods    /*Remove old master repo:*/    sudo rm -fr ~/.cocoapods/repos/master    /*Update gems as user installed:*/    sudo gem update --system --user-install    /*Add local gem path:*/    echo 'export PATH="$PATH:/Users/%username%/.gem/ruby/2.0.0/bin"' >> ~/.bash_login    /*Install CocoaPods without sudo:*/    gem install --user-install cocoapods    /*Setup CocoaPods and Master repo:*/    pod setup

其文件有800多兆大，需要慢慢下载。为了查看安装进度，可以另开启一个终端

（1）输入cd ~/.cocoapods；

（2）进入.cocoapods之后，输入du –sh查看已下载文件的大小。