title: Not able to run project
body: <p>I have selected Location in Xcode preference also but getting the same error:</p>
  
  <p><img src="https://i.stack.imgur.com/tD8SL.png" alt="enter image description here"></p>
  
  <pre><code>xcrun: error: Failed to determine realpath of '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.4.sdk' (errno=No such file or directory)
  xcrun: error: unable to find utility "instruments", not a developer tool or in PATH
  
  Command failed: xcrun instruments -s
  xcrun: error: Failed to determine realpath of '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.4.sdk' (errno=No such file or directory)
  xcrun: error: unable to find utility "instruments", not a developer tool or in PATH
  
  Error: Command failed: xcrun instruments -s
  xcrun: error: Failed to determine realpath of '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.4.sdk' (errno=No such file or directory)
  xcrun: error: unable to find utility "instruments", not a developer tool or in PATH
  
  at checkExecSyncError (child_process.js:601:13)
  at Object.execFileSync (child_process.js:621:13)
  at Object.runIOS [as func] (/Users/ranjith/Documents/Project/Login_React/node_modules/react-native/local-cli/runIOS/runIOS.js:76:17)
  at Promise.resolve.then (/Users/ranjith/Documents/Project/Login_React/node_modules/react-native/local-cli/cliEntry.js:117:22)
  at &lt;anonymous&gt; 
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/rKFHu.png" alt="enter image description here"></p>