Index: src/app/qgsoptions.cpp
===================================================================
--- src/app/qgsoptions.cpp	(revision 15546)
+++ src/app/qgsoptions.cpp	(working copy)
@@ -398,7 +398,8 @@
   chkDisableAttributeValuesDlg->setChecked( settings.value( "/qgis/digitizing/disable_enter_attribute_values_dialog", false ).toBool() );
 
 #ifdef Q_WS_MAC //MH: disable incremental update on Mac for now to avoid problems with resizing
-  groupBox_5->setEnabled( false );
+  chkUseRenderCaching->setEnabled( false );
+  spinBoxUpdateThreshold->setEnabled( false );
 #endif //Q_WS_MAC
 
   //overlay placement algorithm