mac 安装electron出错,走淘宝镜像也不好使?报错

报错内容：

appledeMBP:~ apple$ npm install -g nrm

npm ERR! Darwin 15.6.0

npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "-g" "nrm"

npm ERR! node v4.4.4

npm ERR! npm  v2.15.1

npm ERR! code ECONNRESET

npm ERR! network tunneling socket could not be established, cause=connect ECONNREFUSED 127.0.0.1:8118

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/apple/npm-debug.log