title: Issue installing SFML in Xcode - no suitable image found
body: <p>I'm trying to use SFML 2.5.1 in a C++ Xcode project. I followed <a href="https://www.youtube.com/watch?v=WOyp5n2FmZY" rel="nofollow noreferrer">this</a> tutorial on Youtube. After completing, when trying to build my project, I get the following error code:</p>
  
  <pre><code>dyld: Library not loaded: @rpath/sfml-system.framework/Versions/2.5.1/sfml-system
  Referenced from: /Users/will/Library/Developer/Xcode/DerivedData/FirstSFMLApp-bzfbmdnymuynqtatiocyskrsacno/Build/Products/Debug/FirstSFMLApp.app/Contents/MacOS/FirstSFMLApp
    Reason: no suitable image found.  Did find:
      /Library/Frameworks/sfml-system.framework/Versions/2.5.1/sfml-system: code signature in (/Library/Frameworks/sfml-system.framework/Versions/2.5.1/sfml-system) not valid for use in process using Library Validation: mapped file has no cdhash, completely unsigned? Code has to be at least ad-hoc signed.
  </code></pre>
  
  <p>I've ticked "Run script only when installing" under build phases as required.</p>
  
  <p>Does anyone know how to resolve this issue? I'm new to both C++ and Xcode so I'm ready to believe that I've done something dumb.</p>
  
  <p>Thanks in advance.</p>