title: XCode 7.2 unable to view memory profiling info / Device is offline in instruments
body: <p>I'm running an iOS demo using an Objective C++ library (some .mm files) and would like to profile the app's memory usage with Instruments. However, I see that the debug tab does not show any memory information.</p>
  
  <p><a href="https://i.stack.imgur.com/bQqjP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bQqjP.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/TG0rR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TG0rR.png" alt="enter image description here"></a></p>
  
  <p>Attempting to profile the app in instruments shows my device, but it is grayed out and says it's offline</p>
  
  <p><a href="https://i.stack.imgur.com/B9mmH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/B9mmH.png" alt="enter image description here"></a></p>
  
  <p><strong>How can I fix my XCode to allow for memory debugging/profiling of that project?</strong> Does it have something to do with using an Objective C++ libraries?</p>