Node.js npm安装--save express在OSX Yosemite上发出代理错误

我已经安装了Nodev4.1.0和npm2.14.3，但当我尝试进入命令时：

我收到以下错误消息：

有人有处理这个问题的经验或想法吗？我已尝试使用以下方法配置代理设置：

但这并没有解决问题

将以下代码添加到命令行解决了此问题：

更改注册表=>proxy是不同之处

npm install --save express 

npm ERR! Darwin 14.5.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "--save" "express"
npm ERR! node v4.1.0
npm ERR! npm  v2.14.3
npm ERR! code ENOTFOUND
npm ERR! errno ENOTFOUND
npm ERR! syscall getaddrinfo

npm ERR! network getaddrinfo ENOTFOUND host host:80
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/Christopher_Pelnar/npm-debug.log

npm config set registry=http://registry.npmjs.org

npm config set proxy=http://registry.npmjs.org