'tsc command not found' in compiling typescript
<p>I want to install typescript, so I used the following command:</p>

<pre><code>npm install -g typescript 
</code></pre>

<p>and test <code>tsc --version</code>, but it just show 'tsc command not found'. I have tried many ways as suggested in stackoverflow, github and other sites. but it doesn't work. How could I know typescript is installed and where it is.</p>

<p>my OS is Unix, OS X El Capitan 10.11.6, 
   node version is 4.4.3, 
   npm version is 3.10.5</p>