diff --git a/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm b/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm
index 55a300f164..c5c55a5099 100644
--- a/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm
+++ b/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm
@@ -119,9 +119,9 @@ public:
     {
         if (activePlugins.size() + activeUIs.size() == 0)
         {
-          #if BUILD_AU_CARBON_UI
+           #if BUILD_AU_CARBON_UI
             NSApplicationLoad();
-          #endif
+           #endif
 
             initialiseJuce_GUI();
         }
@@ -140,6 +140,18 @@ public:
         auEvent.mArgument.mParameter.mAudioUnit = GetComponentInstance();
         auEvent.mArgument.mParameter.mScope = kAudioUnitScope_Global;
         auEvent.mArgument.mParameter.mElement = 0;
+
+        CreateElements();
+
+        CAStreamBasicDescription streamDescription;
+        streamDescription.mSampleRate = GetSampleRate();
+        streamDescription.SetCanonical (channelConfigs[0][1], false);
+        Outputs().GetIOElement(0)->SetStreamFormat (streamDescription);
+
+       #if ! JucePlugin_IsSynth
+        streamDescription.SetCanonical (channelConfigs[0][0], false);
+        Inputs().GetIOElement(0)->SetStreamFormat (streamDescription);
+       #endif
     }
 
     ~JuceAU()
diff --git a/modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp b/modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp
index 98b1ca54a3..40906782c8 100644
--- a/modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp
+++ b/modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp
@@ -1310,6 +1310,10 @@ public:
             const int cw = child->getWidth();
             const int ch = child->getHeight();
 
+           #if JUCE_MAC && JUCE_64BIT
+            setTopLeftPosition (0, getHeight() - ch);
+           #endif
+
             wrapper.resizeHostWindow (cw, ch);
 
            #if ! JUCE_LINUX // setSize() on linux causes renoise and energyxt to fail.