title: qt 5.7 + Xcode 8.1 + os x El Capitan - could not resolve SDK Path for 'macosx'
body: <p>I'm new to Qt and have just installed it on my mac running OS X El Capitan. But unfortunately I'm getting <code>could not resolve SDK Path for 'macosx'</code> when trying to run any example app.</p>
  
  <p>I spent some time trying to find solution, but nothing works. I tried changing qdevice.pri according to the SDK version that I found in Xcode (MacOSX.sdk and MacOSX10.12.sdk link) but it didn't help.</p>
  
  <p>My gcc settings are:</p>
  
  <pre><code>Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
  Apple LLVM version 8.0.0 (clang-800.0.42.1)
  Target: x86_64-apple-darwin15.6.0
  Thread model: posix
  InstalledDir: /Library/Developer/CommandLineTools/usr/bin
  </code></pre>
  
  <p>I'm running OS X El Capitan, Xcode 8.1, Qt 5.7.</p>