diff --git a/src/core/UBApplicationController.cpp b/src/core/UBApplicationController.cpp
index 203aad85..6bfcbdef 100644
--- a/src/core/UBApplicationController.cpp
+++ b/src/core/UBApplicationController.cpp
@@ -22,9 +22,7 @@
  * along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <QScriptValue>
-#include <QScriptEngine>
-#include <QUrl>
+
 
 #include "UBApplicationController.h"
 
@@ -67,6 +65,9 @@
 
 #include "ui_mainWindow.h"
 
+#ifdef Q_WS_MAC
+#include <Carbon/Carbon.h>
+#endif
 
 #include "core/memcheck.h"
 
@@ -85,6 +86,7 @@ UBApplicationController::UBApplicationController(UBBoardView *pControlView,
     , mAutomaticCheckForUpdates(false)
     , mCheckingForUpdates(false)
     , mIsShowingDesktop(false)
+    , mHttp(0)
 {
     mDisplayManager = new UBDisplayManager(this);
 
@@ -119,7 +121,7 @@ UBApplicationController::UBApplicationController(UBBoardView *pControlView,
     QTimer::singleShot (1000, this, SLOT (checkAtLaunch()));
 
 
-#ifdef Q_OS_LINUX
+#ifdef Q_WS_X11
     mMainWindow->setStyleSheet("QToolButton { font-size: 11px}");
 #endif
 
@@ -136,6 +138,8 @@ UBApplicationController::~UBApplicationController()
     delete mBlackScene;
     delete mMirror;
 
+    if (mHttp) delete mHttp;
+
     delete(mOpenSankoreImporter);
     mOpenSankoreImporter = NULL;
 }
@@ -475,55 +479,84 @@ void UBApplicationController::showDesktop(bool dontSwitchFrontProcess)
     UBDrawingController::drawingController()->setStylusTool(UBStylusTool::Selector);
 }
 
+
 void UBApplicationController::checkUpdate(QString urlString)
 {
-    //connect(networkAccessManager, &QNetworkAccessManager::finished,
-    //        this, &UBApplicationController::updateRequestFinished);
 
-    connect(networkAccessManager, SIGNAL(finished(QNetworkReply*)),
-            this, SLOT(updateRequestFinished(QNetworkReply*)));
 
-    networkAccessManager->get(QNetworkRequest(QUrl(urlString)));
+    #if  defined(QT_NO_DEBUG)
+    /*
+    if(mHttp)
+        mHttp->deleteLater();
+    QUrl url(urlString);
+    mHttp = new QHttpPart(url.host());
+    connect(mHttp, SIGNAL(requestFinished(int,bool)), this, SLOT(updateRequestFinished(int,bool)));
+    connect(mHttp, SIGNAL(responseHeaderReceived(QHttpResponseHeader)), this, SLOT(updateHeaderReceived(QHttpResponseHeader)));
 
-}
+    mHttp->get(url.path());
 
+   */
+    if(mHttpreply)
+        mHttpreply->deleteLater();
+    QUrl url(urlString);
+    mHttpreply = qnam.get(QNetworkRequest(url));
+    connect(mHttpreply, SIGNAL(requestFinished(int,bool)), this, SLOT(updateRequestFinished(int,bool)));
+    connect(mHttpreply, SIGNAL(responseHeaderReceived(QHttpResponseHeader)), this, SLOT(updateHeaderReceived(QHttpResponseHeader)));
+    // mHttpreply->setUrl(url.path());
+    //mHttp->get(url.path());
+#else
 
 
-void UBApplicationController::updateRequestFinished(QNetworkReply * reply)
-{
-    if (reply->error()) {
-        qWarning() << "HTTP Error";
-        return;
-    }
-    // Check if we are being redirected. If so, call checkUpdate again
-    QVariant redirect_target = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
-
-    if (!redirect_target.isNull()) {
-        // The returned URL might be relative. resolved() creates an absolute url from it
-        QUrl redirect_url(reply->url().resolved(redirect_target.toUrl()));
+#endif
+}
 
-        checkUpdate(redirect_url.toString());
-        return;
+/*
+void UBApplicationController::updateHeaderReceived(QHttpResponseHeader header)
+{
+    if(header.statusCode() == 302 && header.hasKey("Location")){
+        mHttp->close();
+        checkUpdate(header.value("Location"));
     }
 
+}
+*/
+void UBApplicationController::updateHeaderReceived(QNetworkRequest header )
+{
+       //if(header.attribute(QNetworkRequest::HttpStatusCodeAttribute) == 302 && header.header(QNetworkRequest::LocationHeader)){
+       // mHttp->close();
+        mHttpreply->close();
+        //checkUpdate(header.value("Location"));
+   // }
+}
 
-    // No error and no redirect => we read the whole response
-
-    QString responseString = QString(reply->readAll());
-    qDebug() << responseString;
-
-    if (!responseString.isEmpty() &&
-            responseString.contains("version") &&
-            responseString.contains("url")) {
-
-        reply->close();
-        reply->deleteLater();
-
-        downloadJsonFinished(responseString);
-    }
+void UBApplicationController::updateRequestFinished(int id, bool error)
+{
+   if (error){
+       qWarning() << "http command id" << id << "return an error";
+   }
+   else{
+      /* QString responseString =  QString(mHttp->readAll());
+       qDebug() << responseString;
+       if (!responseString.isEmpty() && responseString.contains("version") && responseString.contains("url")){
+           mHttp->close();
+           mHttp->deleteLater();
+           mHttp = 0;
+           downloadJsonFinished(responseString);
+       }
+      */
+        QString responseString =  QString(mHttpreply->readAll());
+        qDebug() << responseString;
+        if (!responseString.isEmpty() && responseString.contains("version") && responseString.contains("url")){
+            mHttpreply->close();
+            mHttpreply->deleteLater();
+            mHttpreply = 0;
+            downloadJsonFinished(responseString);
+        }
+   }
 }
 
 
+
 void UBApplicationController::downloadJsonFinished(QString currentJson)
 {
     QScriptValue scriptValue;