Index: VirtualBox-5.1.10/src/VBox/Frontends/VirtualBox/src/main.cpp
===================================================================
--- VirtualBox-5.1.10.orig/src/VBox/Frontends/VirtualBox/src/main.cpp	2016-11-21 18:31:06.000000000 +0100
+++ VirtualBox-5.1.10/src/VBox/Frontends/VirtualBox/src/main.cpp	2016-11-30 14:04:31.028269344 +0100
@@ -446,6 +446,12 @@ extern "C" DECLEXPORT(int) TrustedMain(i
         qInstallMsgHandler(QtMessageOutput);
 #endif /* QT_VERSION < 0x050000 */
 
+#if QT_VERSION >= 0x050600
+        QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
+#if QT_VERSION >= 0x050700
+        QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+#endif
         /* Create application: */
         QApplication a(argc, argv);
 
@@ -603,6 +609,12 @@ int main(int argc, char **argv, char **e
     /* Initialization failed: */
     if (RT_FAILURE(rc))
     {
+#if QT_VERSION >= 0x050600
+        QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
+#if QT_VERSION >= 0x050700
+        QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+#endif
         /* We have to create QApplication anyway
          * just to show the only one error-message: */
         QApplication a(argc, &argv[0]);