A hint for macOS issues.

modules/doc/install.rst

@@ -324,9 +324,18 @@ version of OpenStructure.
 
 Be careful at -DPYTHON_LIBRARIES, Debian 10 comes with Python 3.7 so that needs
 to be substituted.
-          
+
+
 **macOS (Catalina) with Homebrew**
 
+.. note::
+
+  When switching the Qt version used to compile OST with support for the
+  graphical user interface, dng may start behaving weird. Symptoms are that the
+  user interface starts being unresponsive to mouse clicks. An easy solution
+  may be to close dng and remove
+  $HOME/Library/Preferences/org.openstructure.dng.plist and start dng again.
+
 `Homebrew <https://brew.sh/>`_ can be used to conveniently install all
 dependencies. The current Python version, as of writing these instructions, is
 3.8.3 but works so far. Boost comes as 1.72.0 which seems to be OK. Do not