title: Can't run Qt 5.12.2 on macOS 10.12
body: <p>There is a project I need to build using Qt. I am running macOS 10.12.6 and I have installed XCode 9.2 along with its command line tools. But after installing Qt 5.12.2 (the oldest 5.12 available through its online installer). It will not launch Qt. When I look into the ~/Qt directory, the "Qt Creator" App is showing that it is for macOS 10.13. But Qt's site says 10.12 is supported.</p>
  
  <p><a href="https://doc.qt.io/qt-5.12/supported-platforms.html" rel="nofollow noreferrer">https://doc.qt.io/qt-5.12/supported-platforms.html</a></p>
  
  <p>It has a footnote of:  Note: Xcode 9 is only supported for application development (to be able to opt out of features such as layer-backing and dark mode), not for development of Qt itself.</p>
  
  <p>Am I misunderstanding the requirement? I don't want to upgrade my OS at this points as I don't want to destabilize my other development.</p>