TypeScriptセットアップ手順
$ brew install node
$ brew link node
Linking /usr/local/Cellar/node/0.8.12... Warning: Could not link node. Unlinking...
Error: Could not symlink file: /usr/local/Cellar/node/0.8.12/lib/node_modules
/usr/local/lib is not writable. You should change its permissions.
$ sudo chmod 777 /usr/local/lib
$ brew link node
$ sudo chmod 755 /usr/local/lib
$ curl https://npmjs.org/install.sh | sudo sh
$ npm install -g typescript
$ tsc test.ts