diff --git a/interface/CMakeLists.txt b/interface/CMakeLists.txt
index 32e75c9f34..a0a9033187 100644
--- a/interface/CMakeLists.txt
+++ b/interface/CMakeLists.txt
@@ -161,7 +161,7 @@ if (VISAGE_FOUND AND NOT DISABLE_VISAGE)
         SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-comment -isystem ${VISAGE_INCLUDE_DIRS}")
         find_library(AVFoundation AVFoundation)
         find_library(CoreMedia CoreMedia)
-        find_library(NEW_STD_LIBRARY libc++abi.dylib /usr/lib/)
+        find_library(NEW_STD_LIBRARY libc++.dylib /usr/lib/)
         target_link_libraries(${TARGET_NAME} ${AVFoundation} ${CoreMedia} ${NEW_STD_LIBRARY})
     endif (APPLE)
     target_link_libraries(${TARGET_NAME} ${VISAGE_LIBRARIES})
diff --git a/interface/src/devices/Visage.cpp b/interface/src/devices/Visage.cpp
index 26e7993ecb..c3dfeab6b2 100644
--- a/interface/src/devices/Visage.cpp
+++ b/interface/src/devices/Visage.cpp
@@ -30,12 +30,14 @@ using namespace VisageSDK;
 const glm::vec3 DEFAULT_HEAD_ORIGIN(0.0f, 0.0f, 0.7f);
 
 Visage::Visage() :
+#ifdef HAVE_VISAGE
+    _leftInnerBrowIndex(0),
+    _rightInnerBrowIndex(0),
+#endif
     _active(false),
     _headOrigin(DEFAULT_HEAD_ORIGIN),
     _estimatedEyePitch(0.0f),
-    _estimatedEyeYaw(0.0f),
-    _leftInnerBrowIndex(0),
-    _rightInnerBrowIndex(0) {
+    _estimatedEyeYaw(0.0f) {
     
 #ifdef HAVE_VISAGE
     switchToResourcesParentIfRequired();
@@ -62,6 +64,7 @@ Visage::~Visage() {
 #endif
 }
 
+#ifdef HAVE_VISAGE
 static int leftEyeBlinkIndex = 0;
 static int rightEyeBlinkIndex = 1;
 static int centerBrowIndex = 16;
@@ -74,14 +77,12 @@ static QHash<QByteArray, int> createBlendshapeIndices() {
     blendshapeMap.insert("JawOpen", "au_jaw_drop");
     blendshapeMap.insert("LipsLowerDown", "au_lower_lip_drop");
     blendshapeMap.insert("LipsUpperUp", "au_upper_lip_raiser");
-    blendshapeMap.insert("LipsStretch_L", "au_lip_stretcher_left");
-    blendshapeMap.insert("BrowsU_L", "au_left_outer_brow_raiser");
-    blendshapeMap.insert("BrowsU_C", "au_left_inner_brow_raiser");
-    blendshapeMap.insert("BrowsD_L", "au_left_brow_lowerer");
-    blendshapeMap.insert("LipsStretch_R", "au_lip_stretcher_right");
-    blendshapeMap.insert("BrowsU_R", "au_right_outer_brow_raiser");
-    blendshapeMap.insert("BrowsU_C", "au_right_inner_brow_raiser");
-    blendshapeMap.insert("BrowsD_R", "au_right_brow_lowerer");
+    blendshapeMap.insert("LipsStretch_R", "au_lip_stretcher_left");
+    blendshapeMap.insert("BrowsU_R", "au_left_outer_brow_raiser");
+    blendshapeMap.insert("BrowsD_R", "au_left_brow_lowerer");
+    blendshapeMap.insert("LipsStretch_L", "au_lip_stretcher_right");
+    blendshapeMap.insert("BrowsU_L", "au_right_outer_brow_raiser");
+    blendshapeMap.insert("BrowsD_L", "au_right_brow_lowerer");
     
     QHash<QByteArray, int> blendshapeIndices;
     for (int i = 0;; i++) {
@@ -111,6 +112,7 @@ static const QHash<QByteArray, int>& getBlendshapeIndices() {
     static QHash<QByteArray, int> blendshapeIndices = createBlendshapeIndices();
     return blendshapeIndices;
 }
+#endif
 
 const float TRANSLATION_SCALE = 20.0f;
 
diff --git a/interface/src/devices/Visage.h b/interface/src/devices/Visage.h
index 124ef29e3b..a5c826d1bf 100644
--- a/interface/src/devices/Visage.h
+++ b/interface/src/devices/Visage.h
@@ -42,9 +42,14 @@ public:
     void reset();
     
 private:
-    
+
+#ifdef HAVE_VISAGE
     VisageSDK::VisageTracker2* _tracker;
     VisageSDK::FaceData* _data;
+    int _leftInnerBrowIndex;
+    int _rightInnerBrowIndex;
+    QVector<int> _blendshapeIndices;
+#endif
     
     bool _active;
     glm::quat _headRotation;
@@ -56,10 +61,6 @@ private:
     float _estimatedEyeYaw;
     
     std::vector<float> _blendshapeCoefficients;
-    
-    QVector<int> _blendshapeIndices;
-    int _leftInnerBrowIndex;
-    int _rightInnerBrowIndex;
 };
 
 #endif /* defined(__interface__Visage__) */
diff --git a/interface/src/renderer/Model.cpp b/interface/src/renderer/Model.cpp
index 48e1d0f70c..f1916db4d1 100644
--- a/interface/src/renderer/Model.cpp
+++ b/interface/src/renderer/Model.cpp
@@ -421,6 +421,7 @@ void Model::setURL(const QUrl& url, const QUrl& fallback) {
     _dilatedTextures.clear();
     _lodHysteresis = NetworkGeometry::NO_HYSTERESIS;
     
+    // we retain a reference to the base geometry so that its reference count doesn't fall to zero
     _baseGeometry = _geometry = Application::getInstance()->getGeometryCache()->getGeometry(url, fallback);
 }
 
diff --git a/interface/src/renderer/Model.h b/interface/src/renderer/Model.h
index 1d1cdc22a7..28189d0379 100644
--- a/interface/src/renderer/Model.h
+++ b/interface/src/renderer/Model.h
@@ -227,7 +227,7 @@ private:
     void deleteGeometry();
     void renderMeshes(float alpha, bool translucent);
     
-    QSharedPointer<NetworkGeometry> _baseGeometry;
+    QSharedPointer<NetworkGeometry> _baseGeometry; ///< reference required to prevent collection of base
     float _lodHysteresis;
     
     float _pupilDilation;