diff --git a/cura/UI/PrintInformation.py b/cura/UI/PrintInformation.py
index ae4aab0407..22710165b3 100644
--- a/cura/UI/PrintInformation.py
+++ b/cura/UI/PrintInformation.py
@@ -202,7 +202,11 @@ class PrintInformation(QObject):
         self._material_costs[build_plate_number] = []
         self._material_names[build_plate_number] = []
 
-        material_preference_values = json.loads(self._application.getInstance().getPreferences().getValue("cura/material_settings"))
+        try:
+            material_preference_values = json.loads(self._application.getInstance().getPreferences().getValue("cura/material_settings"))
+        except json.JSONDecodeError:
+            Logger.warning("Material preference values are corrupt. Will revert to defaults!")
+            material_preference_values = {}
 
         for index, extruder_stack in enumerate(global_stack.extruderList):
             if index >= len(self._material_amounts):
diff --git a/resources/qml/Toolbar.qml b/resources/qml/Toolbar.qml
index 0bf09b4d18..89d64b06ad 100644
--- a/resources/qml/Toolbar.qml
+++ b/resources/qml/Toolbar.qml
@@ -78,6 +78,10 @@ Item
                         {
                             base.activeY = y;
                         }
+                        //Clear focus when tools change. This prevents the tool grabbing focus when activated.
+                        //Grabbing focus prevents items from being deleted.
+                        //Apparently this was only a problem on MacOS.
+                        forceActiveFocus();
                     }
 
                     //Workaround since using ToolButton's onClicked would break the binding of the checked property, instead