title: CDK command not found - macOS
body: <p>I have installed node, aws-cdk successfully. but when I run cdk --version/cdk doc , the terminal doesn't recognise CDK commands.</p>
  <p>I am on mac OS, and I am new user of Mac, if some one can help, what path variable i need to set and how to set it.</p>
  <p>Many thanks,</p>