mac系統 下 npm 安裝 bower報錯

在mac終端運行 sudo npm install -g bower

(安裝之前你要確定你已經成功安裝了node 和 git)

然後會報錯 like this:

npm ERR! Darwin 15.4.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "install" "-g" "bower"
npm ERR! node v5.2.0
npm ERR! npm  v3.3.12
npm ERR! path /Users/path-to-directory/node_modules/npm/node_modules/rimraf/bin.js
...
npm ERR! shasum check failed for /tmp/npm-12464-50e9876a/registry.npmjs.org/bower/-/bower-1.8.0.tgz
...

解決辦法:
先在終端運行:xcodebuild -license

再運行:sudo npm install -g bower