src/browser/qgsbrowser.cpp

@@ -375,6 +375,19 @@ void QgsBrowser::keyPressEvent( QKeyEvent * e )
   }
 }
 
+void QgsBrowser::keyReleaseEvent( QKeyEvent * e )
+{
+  QgsDebugMsg( "Entered" );
+  if ( treeView->hasFocus() && ( e->key() == Qt::Key_Up || e->key() == Qt::Key_Down ) )
+  {
+    itemClicked( treeView->selectionModel()->currentIndex() );
+  }
+  else
+  {
+    e->ignore();
+  }
+}
+
 void QgsBrowser::stopRendering()
 {
   // you might have seen this already in QgisApp

src/browser/qgsbrowser.h

@@ -59,6 +59,7 @@ class QgsBrowser : public QMainWindow, private Ui::QgsBrowserBase
 
   protected:
     void keyPressEvent( QKeyEvent * e );
+    void keyReleaseEvent( QKeyEvent * e );
 
     bool layerClicked( QgsLayerItem* ptr );
 

src/core/qgsbrowsermodel.cpp

@@ -66,6 +66,13 @@ void QgsBrowserModel::addRootItems()
     mRootItems << item;
   }
 
+#ifdef Q_WS_MAC
+  QString path = QString( "/Volumes" );
+  QgsDirectoryItem *vols = new QgsDirectoryItem( NULL, path, path );
+  connectItem( vols );
+  mRootItems << vols;
+#endif
+
   // Add non file top level items
   QStringList providersList = QgsProviderRegistry::instance()->providerList();
   providersList.sort();