diff --git a/src/gui/dialogs/qfiledialog_mac.mm b/src/gui/dialogs/qfiledialog_mac.mm
index 87850a7..ed5e348 100644
--- a/src/gui/dialogs/qfiledialog_mac.mm
+++ b/src/gui/dialogs/qfiledialog_mac.mm
@@ -148,7 +148,7 @@ QT_USE_NAMESPACE
     }

     [mSavePanel setLevel:NSModalPanelWindowLevel];
-    [mSavePanel setDelegate:self];
+    [mSavePanel setDelegate:(id)self];
     mQDirFilter = new QT_PREPEND_NAMESPACE(QDir::Filters)(qDirFilter);
     mFileOptions = new QT_PREPEND_NAMESPACE(QFileDialog::Options)(fileOptions);
     mFileMode = fileMode;
diff --git a/src/gui/dialogs/qfontdialog_mac.mm b/src/gui/dialogs/qfontdialog_mac.mm
index 9c63dfa..12cea19 100644
--- a/src/gui/dialogs/qfontdialog_mac.mm
+++ b/src/gui/dialogs/qfontdialog_mac.mm
@@ -500,7 +500,7 @@ void QFontDialogPrivate::setFont(void *delegate, const QFont &font)

 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
     if (qstrcmp(fe->name(), "CoreText") == 0) {
-        nsFont = reinterpret_cast<const NSFont *>(static_cast<QCoreTextFontEngineMulti *>(fe)->ctfont);
+        nsFont = (NSFont *)reinterpret_cast<const NSFont *>(static_cast<QCoreTextFontEngineMulti *>(fe)->ctfont);
     } else
 #endif
     {
diff --git a/src/gui/kernel/qapplication_mac.mm b/src/gui/kernel/qapplication_mac.mm
index dd819e5..48a59a5 100644
--- a/src/gui/kernel/qapplication_mac.mm
+++ b/src/gui/kernel/qapplication_mac.mm
@@ -1244,7 +1244,7 @@ void qt_init(QApplicationPrivate *priv, int)
 #ifdef QT_MAC_USE_COCOA
     NSApplication *cocoaApp = [QNSApplication sharedApplication];
     QMacCocoaAutoReleasePool pool;
-    NSObject *oldDelegate = [cocoaApp delegate];
+    id oldDelegate = [cocoaApp delegate];
     QT_MANGLE_NAMESPACE(QCocoaApplicationDelegate) *newDelegate = [QT_MANGLE_NAMESPACE(QCocoaApplicationDelegate) sharedDelegate];
     Q_ASSERT(newDelegate);
     [newDelegate setQtPrivate:priv];
diff --git a/src/gui/kernel/qcocoamenuloader_mac.mm b/src/gui/kernel/qcocoamenuloader_mac.mm
index 8d38f45..90b9437 100644
--- a/src/gui/kernel/qcocoamenuloader_mac.mm
+++ b/src/gui/kernel/qcocoamenuloader_mac.mm
@@ -70,7 +70,7 @@ QT_USE_NAMESPACE
     showAllItem = [[appMenu itemWithTitle:@"Show All"] retain];

     // Get the names in the nib to match the app name set by Qt.
-    NSString *appName = reinterpret_cast<const NSString*>(QCFString::toCFStringRef(qAppName()));
+    NSString *appName = (NSString *)reinterpret_cast<const NSString*>(QCFString::toCFStringRef(qAppName()));
     [quitItem setTitle:[[quitItem title] stringByReplacingOccurrencesOfString:@"NewApplication"
                                                                    withString:appName]];
     [hideItem setTitle:[[hideItem title] stringByReplacingOccurrencesOfString:@"NewApplication"
diff --git a/src/gui/kernel/qcocoaview_mac.mm b/src/gui/kernel/qcocoaview_mac.mm
index a552ce7..ad9f899 100644
--- a/src/gui/kernel/qcocoaview_mac.mm
+++ b/src/gui/kernel/qcocoaview_mac.mm
@@ -1386,7 +1386,7 @@ static int qCocoaViewCount = 0;
     QString selectedText(qwidget->inputMethodQuery(Qt::ImCurrentSelection).toString());
     if (!selectedText.isEmpty()) {
         QCFString string(selectedText.mid(theRange.location, theRange.length));
-        const NSString *tmpString = reinterpret_cast<const NSString *>((CFStringRef)string);
+        NSString *tmpString = (NSString *)reinterpret_cast<const NSString *>((CFStringRef)string);
         return [[[NSAttributedString alloc]  initWithString:tmpString] autorelease];
     } else {
         return nil;
diff --git a/src/gui/kernel/qt_cocoa_helpers_mac.mm b/src/gui/kernel/qt_cocoa_helpers_mac.mm
index 3945754..5fe25d2 100644
--- a/src/gui/kernel/qt_cocoa_helpers_mac.mm
+++ b/src/gui/kernel/qt_cocoa_helpers_mac.mm
@@ -1331,7 +1331,7 @@ QString qt_mac_get_pasteboardString(OSPasteboardRef paste)
     if (PasteboardCopyName (paste, &pbname)) {
         pb = [NSPasteboard generalPasteboard];
     } else {
-        pb = [NSPasteboard pasteboardWithName:reinterpret_cast<const NSString *>(pbname)];
+        pb = [NSPasteboard pasteboardWithName:(NSString *)pbname];
         CFRelease (pbname);
     }
     if (pb) {
diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm
index 1e2aa9f..dc7a895 100644
--- a/src/gui/kernel/qwidget_mac.mm
+++ b/src/gui/kernel/qwidget_mac.mm
@@ -3175,7 +3175,7 @@ void QWidgetPrivate::setWindowIcon_sys(bool forceReset)
         NSButton *iconButton = [qt_mac_window_for(q) standardWindowButton:NSWindowDocumentIconButton];
         if (iconButton == nil) {
             QCFString string(q->windowTitle());
-            const NSString *tmpString = reinterpret_cast<const NSString *>((CFStringRef)string);
+            NSString *tmpString = (NSString *)reinterpret_cast<const NSString *>((CFStringRef)string);
             [qt_mac_window_for(q) setRepresentedURL:[NSURL fileURLWithPath:tmpString]];
             iconButton = [qt_mac_window_for(q) standardWindowButton:NSWindowDocumentIconButton];
         }
diff --git a/src/plugins/bearer/corewlan/qcorewlanengine.mm b/src/plugins/bearer/corewlan/qcorewlanengine.mm
index 844e38b..e2eafd6 100644
--- a/src/plugins/bearer/corewlan/qcorewlanengine.mm
+++ b/src/plugins/bearer/corewlan/qcorewlanengine.mm
@@ -850,7 +850,7 @@ quint64 QCoreWlanEngine::bytesReceived(const QString &id)
     return getBytes(interfaceStr,true);
 }

-quint64 QCoreWlanEngine::startTime(const QString &id)
+quint64 QCoreWlanEngine::startTime(const QString &ident)
 {
     QMutexLocker locker(&mutex);
     QMacCocoaAutoReleasePool pool;
@@ -884,8 +884,8 @@ quint64 QCoreWlanEngine::startTime(const QString &id)
                 bool ok = false;
                 for(int i = 0; i < dictSize; i++) {
                     if([ssidStr isEqualToString:keys[i]]) {
-                        const QString ident = QString::number(qHash(QLatin1String("corewlan:") + qt_mac_NSStringToQString(objects[i])));
-                        if(ident == id) {
+                        const QString curident = QString::number(qHash(QLatin1String("corewlan:") + qt_mac_NSStringToQString(objects[i])));
+                        if(curident == ident) {
                             ok = true;
                         }
                     }