message: document selecting xcode command-line tools
diff: @@ -11,7 +11,13 @@ To target iOS, some additional environment setup is required. Unfortunately, iOS
  ## Xcode
  -<a href="https://developer.apple.com/xcode/" target="_blank">Xcode</a> is the IDE for creating native iOS apps. It includes the iOS SDK and Xcode command-line tools. Xcode can be <a href="https://developer.apple.com/download/" target="_blank">downloaded for free</a> with an Apple account. It can also be installed through the App Store.
  +[Xcode](https://developer.apple.com/xcode/) is the IDE for creating native iOS apps. It includes the iOS SDK and Xcode command-line tools. Xcode can be [downloaded for free](https://developer.apple.com/download/) with an Apple account. It can also be installed through the App Store.
  +
  +Once Xcode is installed, make sure the command-line tools are selected for use:
  +
  +```shell
  +$ xcode-select --install
  +```
  ### Setting up a Development Team
  @@ -23,7 +29,7 @@ Open Xcode and navigate to **Xcode** &raquo; **Preferences** &raquo; **Accounts*
  ### Creating an iOS Simulator
  -The iOS simulator emulates iOS devices on Macs. The following documentation is a quick way to get the iOS simulator set up. For more information, see <a href="https://developer.apple.com/library/content/documentation/IDEs/Conceptual/simulator_help_topics/Chapter/Chapter.html" target="_blank">Apple's documentation</a>.
  +The iOS simulator emulates iOS devices on Macs. The following documentation is a quick way to get the iOS simulator set up. For more information, see [Apple's documentation](https://developer.apple.com/library/content/documentation/IDEs/Conceptual/simulator_help_topics/Chapter/Chapter.html).
  Open Xcode and navigate to **Window** &raquo; **Devices and Simulators**. Create an **iPhone X** simulator if one does not already exist.
  @@ -31,7 +37,7 @@ Open Xcode and navigate to **Window** &raquo; **Devices and Simulators**. Create
  ## ios-sim & ios-deploy
  -The <a href="https://github.com/phonegap/ios-sim" target="_blank">`ios-sim`</a> and <a href="https://github.com/phonegap/ios-deploy" target="_blank">`ios-deploy`</a> are utilities that deploy apps to the iOS simulator and iOS devices during development. They can be installed globally with [npm](/docs/faq/glossary#npm).
  +The [`ios-sim`](https://github.com/phonegap/ios-sim) and [`ios-deploy`](https://github.com/phonegap/ios-deploy) are utilities that deploy apps to the iOS simulator and iOS devices during development. They can be installed globally with [npm](/docs/faq/glossary#npm).
  ```shell
  $ npm install -g ios-sim
  