Merge pull request #6572 from howard-stearns/fix-render-rate

Fix render rate.

libraries/display-plugins/src/display-plugins/OpenGLDisplayPlugin.cpp

@@ -152,7 +152,14 @@ OpenGLDisplayPlugin::OpenGLDisplayPlugin() {
     });
 
     connect(&_timer, &QTimer::timeout, this, [&] {
+#ifdef Q_OS_MAC
+        // On Mac, QT thread timing is such that we can miss one or even two cycles quite often, giving a render rate (including update/simulate)
+        // far lower than what we want. This hack keeps that rate more natural, at the expense of some wasted rendering.
+        // This is likely to be mooted by further planned changes.
+        if (_active && _sceneTextureEscrow.depth() <= 1) {
+#else
         if (_active && _sceneTextureEscrow.depth() < 1) {
+#endif
             emit requestRender();
         }
     });