title: could not attach to pid on xcode 8.1 simulator
body: <p>I have been having this error:</p>
  
  <pre><code>could not attach to pid
  </code></pre>
  
  <p>From Xcode for about 3 days now. The weird thing is during the 3 weeks it got me to finish this project I have had no issues with running the project on the simulator, but after I successfully added provisioning profile I have been having this issue. </p>
  
  <p>I have tried all other solutions posted on here and other forums but all don't seem to work for me. I am using Xcode 8.1 and macOS Sierra.</p>