diff --git a/src/plugins/coreplugin/coreplugin.pro b/src/plugins/coreplugin/coreplugin.pro
index a118daf93a84eabad859e77c3b333b80f9a023eb..c65054df867b6cbf93c1ab19da3c42e3e45ba896 100644
--- a/src/plugins/coreplugin/coreplugin.pro
+++ b/src/plugins/coreplugin/coreplugin.pro
@@ -213,9 +213,7 @@ win32 {
     LIBS += -lole32
 }
 else:macx {
-    OBJECTIVE_SOURCES += progressmanager/progressmanager_mac.mm \
-                         fullscreen.mm
-
+    OBJECTIVE_SOURCES += progressmanager/progressmanager_mac.mm
     LIBS += -framework AppKit
 }
 else:unix {
diff --git a/src/plugins/coreplugin/fullscreen.mm b/src/plugins/coreplugin/fullscreen.mm
deleted file mode 100644
index 3f8510196dccdee1c97184957e6cd433bd3bc4fc..0000000000000000000000000000000000000000
--- a/src/plugins/coreplugin/fullscreen.mm
+++ /dev/null
@@ -1,46 +0,0 @@
-/**************************************************************************
-**
-** This file is part of Qt Creator
-**
-** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
-**
-** Contact: Nokia Corporation (info@qt.nokia.com)
-**
-**
-** GNU Lesser General Public License Usage
-**
-** This file may be used under the terms of the GNU Lesser General Public
-** License version 2.1 as published by the Free Software Foundation and
-** appearing in the file LICENSE.LGPL included in the packaging of this file.
-** Please review the following information to ensure the GNU Lesser General
-** Public License version 2.1 requirements will be met:
-** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Nokia gives you certain additional
-** rights. These rights are described in the Nokia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** Other Usage
-**
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-** If you have questions regarding the use of this file, please contact
-** Nokia at info@qt.nokia.com.
-**
-**************************************************************************/
-
-#import <Cocoa/Cocoa.h>
-#include <QWidget>
-
-void enableMacFullScreen(WId winId)
-{
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
-    if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_7) {
-        NSView *nsview = reinterpret_cast<NSView *>(winId);
-        NSWindow *nswindow = [nsview window];
-        [nswindow setCollectionBehavior:NSWindowCollectionBehaviorFullScreenPrimary];
-    }
-#endif
-}
-
diff --git a/src/plugins/coreplugin/mainwindow.cpp b/src/plugins/coreplugin/mainwindow.cpp
index 527e75c0efc625bc6dc80886b1b38ded599f3c54..2a23400adbe9b1838124bfcf65d05e35d08f5e44 100644
--- a/src/plugins/coreplugin/mainwindow.cpp
+++ b/src/plugins/coreplugin/mainwindow.cpp
@@ -225,11 +225,6 @@ MainWindow::MainWindow() :
      //signal(SIGINT, handleSigInt);
 #endif
 
-#ifdef Q_WS_MAC
-    extern void enableMacFullScreen(WId);
-    enableMacFullScreen(winId());
-#endif
-
     statusBar()->setProperty("p_styled", true);
     setAcceptDrops(true);
 }