| 
							- diff --git a/mkspecs/common/clang-mac.conf b/mkspecs/common/clang-mac.conf
 - index cbae2e62..dc4694fa 100644
 - --- a/mkspecs/common/clang-mac.conf
 - +++ b/mkspecs/common/clang-mac.conf
 - @@ -10,4 +10,5 @@ QMAKE_CXXFLAGS += -stdlib=libc++
 -  QMAKE_LFLAGS   += -stdlib=libc++
 -  QMAKE_AR_LTCG  = libtool -static -o
 -  
 - -QMAKE_CFLAGS_APPLICATION_EXTENSION  = -fapplication-extension
 - +QMAKE_CFLAGS_APPLICATION_EXTENSION  =
 - +# -fapplication-extension
 - diff --git a/src/corelib/global/qoperatingsystemversion_darwin.mm b/src/corelib/global/qoperatingsystemversion_darwin.mm
 - index d8b927ff..9a690adc 100644
 - --- a/src/corelib/global/qoperatingsystemversion_darwin.mm
 - +++ b/src/corelib/global/qoperatingsystemversion_darwin.mm
 - @@ -40,16 +40,37 @@
 -  #include "qoperatingsystemversion_p.h"
 -  #import <Foundation/Foundation.h>
 -  
 - +typedef qint16 (*GestaltFunction)(quint32 selector, qint32 *response);
 - +
 -  QT_BEGIN_NAMESPACE
 -  
 -  QOperatingSystemVersion QOperatingSystemVersion::current()
 -  {
 - -    NSOperatingSystemVersion osv = NSProcessInfo.processInfo.operatingSystemVersion;
 -      QOperatingSystemVersion v;
 -      v.m_os = currentType();
 - -    v.m_major = osv.majorVersion;
 - -    v.m_minor = osv.minorVersion;
 - -    v.m_micro = osv.patchVersion;
 - +    v.m_major = -1;
 - +    v.m_minor = -1;
 - +    v.m_micro = -1;
 - +    static GestaltFunction pGestalt = 0;
 - +    if (!pGestalt) {
 - +        CFBundleRef b = CFBundleGetBundleWithIdentifier(CFSTR("com.apple.CoreServices"));
 - +        pGestalt = reinterpret_cast<GestaltFunction>(CFBundleGetFunctionPointerForName(b,
 - +                                                     CFSTR("Gestalt")));
 - +    }
 - +    // Use temporary variables so we can return 0.0.0 (unknown version)
 - +    // in case of an error partway through determining the OS version
 - +    qint32 major = 0, minor = 0, patch = 0;
 - +    if (!pGestalt)
 - +        return v;
 - +    if (pGestalt('sys1', &major) != 0)
 - +        return v;
 - +    if (pGestalt('sys2', &minor) != 0)
 - +        return v;
 - +    if (pGestalt('sys3', &patch) != 0)
 - +        return v;
 - +    v.m_major = major;
 - +    v.m_minor = minor;
 - +    v.m_micro = patch;
 -      return v;
 -  }
 -  
 - diff --git a/src/corelib/io/qfilesystemengine_unix.cpp b/src/corelib/io/qfilesystemengine_unix.cpp
 - index 7fed54f7..bbf5e6d6 100644
 - --- a/src/corelib/io/qfilesystemengine_unix.cpp
 - +++ b/src/corelib/io/qfilesystemengine_unix.cpp
 - @@ -126,8 +126,11 @@ static bool isPackage(const QFileSystemMetaData &data, const QFileSystemEntry &e
 -  
 -  #ifdef Q_OS_MACOS
 -          // Find if an application other than Finder claims to know how to handle the package
 - -        QCFType<CFURLRef> application = LSCopyDefaultApplicationURLForURL(url,
 - -            kLSRolesEditor | kLSRolesViewer, nullptr);
 - +        QCFType<CFURLRef> application;
 - +        LSGetApplicationForURL(url,
 - +                               kLSRolesEditor|kLSRolesViewer,
 - +                               NULL,
 - +                               &application);
 -  
 -          if (application) {
 -              QCFType<CFBundleRef> bundle = CFBundleCreate(kCFAllocatorDefault, application);
 - diff --git a/src/corelib/kernel/qcore_foundation.mm b/src/corelib/kernel/qcore_foundation.mm
 - index 56eabc4b..c48a7979 100644
 - --- a/src/corelib/kernel/qcore_foundation.mm
 - +++ b/src/corelib/kernel/qcore_foundation.mm
 - @@ -46,7 +46,7 @@
 -  #include <QtCore/qbytearray.h>
 -  #include <QtCore/qrect.h>
 -  
 - -#if QT_CONFIG(timezone) && !defined(QT_NO_SYSTEMLOCALE)
 - +#if 0
 -  #include <QtCore/qtimezone.h>
 -  #include <QtCore/private/qtimezoneprivate_p.h>
 -  #include <QtCore/private/qcore_mac_p.h>
 - @@ -433,7 +433,7 @@ NSDate *QDateTime::toNSDate() const
 -  
 -  // ----------------------------------------------------------------------------
 -  
 - -#if QT_CONFIG(timezone) && !defined(QT_NO_SYSTEMLOCALE)
 - +#if 0
 -  /*!
 -      \since 5.9
 -  
 - diff --git a/src/corelib/tools/qtimezone.h b/src/corelib/tools/qtimezone.h
 - index bd87139f..d154cbf9 100644
 - --- a/src/corelib/tools/qtimezone.h
 - +++ b/src/corelib/tools/qtimezone.h
 - @@ -47,7 +47,7 @@
 -  
 -  QT_REQUIRE_CONFIG(timezone);
 -  
 - -#if (defined(Q_OS_DARWIN) || defined(Q_QDOC)) && !defined(QT_NO_SYSTEMLOCALE)
 - +#if 0
 -  Q_FORWARD_DECLARE_CF_TYPE(CFTimeZone);
 -  Q_FORWARD_DECLARE_OBJC_CLASS(NSTimeZone);
 -  #endif
 - @@ -147,7 +147,7 @@ public:
 -      static QList<QByteArray> windowsIdToIanaIds(const QByteArray &windowsId,
 -                                                   QLocale::Country country);
 -  
 - -#if (defined(Q_OS_DARWIN) || defined(Q_QDOC)) && !defined(QT_NO_SYSTEMLOCALE)
 - +#if 0
 -      static QTimeZone fromCFTimeZone(CFTimeZoneRef timeZone);
 -      CFTimeZoneRef toCFTimeZone() const Q_DECL_CF_RETURNS_RETAINED;
 -      static QTimeZone fromNSTimeZone(const NSTimeZone *timeZone);
 - diff --git a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm
 - index f8fe160e..3c350b3c 100644
 - --- a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm
 - +++ b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm
 - @@ -456,7 +456,6 @@ QFontEngine *QCoreTextFontDatabaseEngineFactory<QFontEngineFT>::fontEngine(const
 -          return QFontEngineFT::create(*fontData, fontDef.pixelSize,
 -              static_cast<QFont::HintingPreference>(fontDef.hintingPreference));
 -      } else if (NSURL *url = descriptorAttribute<NSURL>(descriptor, kCTFontURLAttribute)) {
 - -        Q_ASSERT(url.fileURL);
 -          QFontEngine::FaceId faceId;
 -          faceId.filename = QString::fromNSString(url.path).toUtf8();
 -          return QFontEngineFT::create(fontDef, faceId);
 - diff --git a/src/plugins/platforms/cocoa/qcocoamenu.mm b/src/plugins/platforms/cocoa/qcocoamenu.mm
 - index e41c70b8..815028b7 100644
 - --- a/src/plugins/platforms/cocoa/qcocoamenu.mm
 - +++ b/src/plugins/platforms/cocoa/qcocoamenu.mm
 - @@ -329,13 +329,6 @@ void QCocoaMenu::insertMenuItem(QPlatformMenuItem *menuItem, QPlatformMenuItem *
 -      }
 -  
 -      insertNative(cocoaItem, beforeItem);
 - -
 - -    // Empty menus on a menubar are hidden by default. If the menu gets
 - -    // added to the menubar before it contains any item, we need to sync.
 - -    if (isVisible() && attachedItem().hidden) {
 - -        if (auto *mb = qobject_cast<QCocoaMenuBar *>(menuParent()))
 - -            mb->syncMenu(this);
 - -    }
 -  }
 -  
 -  void QCocoaMenu::insertNative(QCocoaMenuItem *item, QCocoaMenuItem *beforeItem)
 - diff --git a/src/plugins/platforms/cocoa/qcocoamenubar.mm b/src/plugins/platforms/cocoa/qcocoamenubar.mm
 - index a4cd465d..06d63f7d 100644
 - --- a/src/plugins/platforms/cocoa/qcocoamenubar.mm
 - +++ b/src/plugins/platforms/cocoa/qcocoamenubar.mm
 - @@ -369,7 +369,7 @@ void QCocoaMenuBar::updateMenuBarImmediately()
 -      QCocoaMenuLoader *loader = [QCocoaMenuLoader sharedMenuLoader];
 -      [loader ensureAppMenuInMenu:mb->nsMenu()];
 -  
 - -    NSMutableSet *mergedItems = [[NSMutableSet setWithCapacity:mb->merged().count()] retain];
 - +    NSMutableSet *mergedItems = [[NSMutableSet setWithCapacity:0] retain];
 -      foreach (QCocoaMenuItem *m, mb->merged()) {
 -          [mergedItems addObject:m->nsItem()];
 -          m->syncMerged();
 - diff --git a/src/plugins/platforms/cocoa/qcocoanativeinterface.mm b/src/plugins/platforms/cocoa/qcocoanativeinterface.mm
 - index 5504c242..fa0b7f71 100644
 - --- a/src/plugins/platforms/cocoa/qcocoanativeinterface.mm
 - +++ b/src/plugins/platforms/cocoa/qcocoanativeinterface.mm
 - @@ -172,12 +172,11 @@ void *QCocoaNativeInterface::NSPrintInfoForPrintEngine(QPrintEngine *printEngine
 -  
 -  QPixmap QCocoaNativeInterface::defaultBackgroundPixmapForQWizard()
 -  {
 - +    QCFType<CFURLRef> url;
 -      const int ExpectedImageWidth = 242;
 -      const int ExpectedImageHeight = 414;
 - -    QCFType<CFArrayRef> urls = LSCopyApplicationURLsForBundleIdentifier(
 - -        CFSTR("com.apple.KeyboardSetupAssistant"), nullptr);
 - -    if (urls && CFArrayGetCount(urls) > 0) {
 - -        CFURLRef url = (CFURLRef)CFArrayGetValueAtIndex(urls, 0);
 - +    if (LSFindApplicationForInfo(kLSUnknownCreator, CFSTR("com.apple.KeyboardSetupAssistant"), 
 - +                                 0, 0, &url) == noErr) {
 -          QCFType<CFBundleRef> bundle = CFBundleCreate(kCFAllocatorDefault, url);
 -          if (bundle) {
 -              url = CFBundleCopyResourceURL(bundle, CFSTR("Background"), CFSTR("png"), 0);
 - diff --git a/src/plugins/platforms/cocoa/qcocoawindow.h b/src/plugins/platforms/cocoa/qcocoawindow.h
 - index aa8fffdf..191553e6 100644
 - --- a/src/plugins/platforms/cocoa/qcocoawindow.h
 - +++ b/src/plugins/platforms/cocoa/qcocoawindow.h
 - @@ -316,6 +316,8 @@ public: // for QNSView
 -      bool m_viewIsEmbedded; // true if the m_view is actually embedded in a "foreign" NSView hiearchy
 -      bool m_viewIsToBeEmbedded; // true if the m_view is intended to be embedded in a "foreign" NSView hiearchy
 -  
 - +    QCocoaWindow *m_parentCocoaWindow;
 - +
 -      Qt::WindowFlags m_windowFlags;
 -      Qt::WindowState m_lastReportedWindowState;
 -      Qt::WindowModality m_windowModality;
 - diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
 - index 86fd7b8a..c7aa5792 100644
 - --- a/src/plugins/platforms/cocoa/qcocoawindow.mm
 - +++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
 - @@ -325,7 +325,7 @@ static void qt_closePopups()
 -  + (void)applicationActivationChanged:(NSNotification*)notification
 -  {
 -      const id sender = self;
 - -    NSEnumerator<NSWindow*> *windowEnumerator = nullptr;
 - +    NSEnumerator* windowEnumerator = nullptr;
 -      NSApplication *application = [NSApplication sharedApplication];
 -  
 -  #if QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_12)
 - @@ -526,6 +526,7 @@ QCocoaWindow::QCocoaWindow(QWindow *tlw, WId nativeHandle)
 -      , m_nsWindow(0)
 -      , m_viewIsEmbedded(false)
 -      , m_viewIsToBeEmbedded(false)
 - +    , m_parentCocoaWindow(0)
 -      , m_lastReportedWindowState(Qt::WindowNoState)
 -      , m_windowModality(Qt::NonModal)
 -      , m_windowUnderMouse(false)
 - @@ -594,10 +595,12 @@ QCocoaWindow::~QCocoaWindow()
 -      [m_nsWindow makeFirstResponder:nil];
 -      [m_nsWindow setContentView:nil];
 -      [m_nsWindow.helper detachFromPlatformWindow];
 - -    if (m_view.window.parentWindow)
 - -        [m_view.window.parentWindow removeChildWindow:m_view.window];
 - -    else if ([m_view superview])
 - +    if (m_view.window.parentWindow) {
 - +        if (m_parentCocoaWindow)
 - +            m_parentCocoaWindow->removeChildWindow(this);
 - +    } else if ([m_view superview]) {
 -          [m_view removeFromSuperview];
 - +    }
 -  
 -      removeMonitor();
 -  
 - @@ -614,6 +617,7 @@ QCocoaWindow::~QCocoaWindow()
 -  
 -      foreachChildNSWindow(^(QCocoaWindow *childWindow) {
 -          [m_nsWindow removeChildWindow:childWindow->m_nsWindow];
 - +        childWindow->m_parentCocoaWindow = 0;
 -      });
 -  
 -      [m_view release];
 - @@ -690,7 +694,7 @@ void QCocoaWindow::setCocoaGeometry(const QRect &rect)
 -  
 -      if (isChildNSWindow()) {
 -          QPlatformWindow::setGeometry(rect);
 - -        NSWindow *parentNSWindow = m_view.window.parentWindow;
 - +        NSWindow *parentNSWindow = m_parentCocoaWindow->m_nsWindow;
 -          NSRect parentWindowFrame = [parentNSWindow contentRectForFrameRect:parentNSWindow.frame];
 -          clipWindow(parentWindowFrame);
 -  
 - @@ -744,7 +748,7 @@ void QCocoaWindow::clipWindow(const NSRect &clipRect)
 -              m_hiddenByClipping = false;
 -              if (!m_hiddenByAncestor) {
 -                  [m_nsWindow orderFront:nil];
 - -                static_cast<QCocoaWindow *>(QPlatformWindow::parent())->reinsertChildWindow(this);
 - +                m_parentCocoaWindow->reinsertChildWindow(this);
 -              }
 -          }
 -      }
 - @@ -781,7 +785,7 @@ void QCocoaWindow::show(bool becauseOfAncestor)
 -      if ([m_nsWindow isVisible])
 -          return;
 -  
 - -    if (m_view.window.parentWindow && !m_view.window.parentWindow.visible) {
 - +    if (m_parentCocoaWindow && ![m_parentCocoaWindow->m_nsWindow isVisible]) {
 -          m_hiddenByAncestor = true; // Parent still hidden, don't show now
 -      } else if ((becauseOfAncestor == m_hiddenByAncestor) // Was NEITHER explicitly hidden
 -                 && !m_hiddenByClipping) { // ... NOR clipped
 - @@ -792,7 +796,7 @@ void QCocoaWindow::show(bool becauseOfAncestor)
 -          if (!m_hiddenByClipping) { // setCocoaGeometry() can change the clipping status
 -              [m_nsWindow orderFront:nil];
 -              if (isChildNSWindow())
 - -                static_cast<QCocoaWindow *>(QPlatformWindow::parent())->reinsertChildWindow(this);
 - +                m_parentCocoaWindow->reinsertChildWindow(this);
 -              foreachChildNSWindow(^(QCocoaWindow *childWindow) {
 -                  childWindow->show(true);
 -              });
 - @@ -1190,7 +1194,7 @@ void QCocoaWindow::raise()
 -              // -[NSWindow orderFront:] doesn't work with attached windows.
 -              // The only solution is to remove and add the child window.
 -              // This will place it on top of all the other NSWindows.
 - -            NSWindow *parentNSWindow = m_view.window.parentWindow;
 - +            NSWindow *parentNSWindow = m_parentCocoaWindow->m_nsWindow;
 -              [parentNSWindow removeChildWindow:m_nsWindow];
 -              [parentNSWindow addChildWindow:m_nsWindow ordered:NSWindowAbove];
 -          } else {
 - @@ -1226,7 +1230,7 @@ void QCocoaWindow::lower()
 -              // The only solution is to remove and add all the child windows except this one.
 -              // This will keep the current window at the bottom while adding the others on top of it,
 -              // hopefully in the same order (this is not documented anywhere in the Cocoa documentation).
 - -            NSWindow *parentNSWindow = m_view.window.parentWindow;
 - +            NSWindow *parentNSWindow = m_parentCocoaWindow->m_nsWindow;
 -              NSArray *children = [parentNSWindow.childWindows copy];
 -              for (NSWindow *child in children)
 -                  if (m_nsWindow != child) {
 - @@ -1698,14 +1702,15 @@ void QCocoaWindow::recreateWindowIfNeeded()
 -  
 -      qCDebug(lcQpaCocoaWindow) << "Reconfiguring NSWindow due to" << recreateReason;
 -  
 - -    QCocoaWindow *parentCocoaWindow = static_cast<QCocoaWindow *>(parentWindow);
 - +    // FIXME: Replace member with direct parentWindow usage (possibly cast)
 - +    m_parentCocoaWindow = static_cast<QCocoaWindow *>(parentWindow);
 -  
 -      if (shouldBeChildNSWindow) {
 -          QWindow *parentQWindow = parentWindow->window();
 -          // Ensure that all parents in the hierarchy are also child NSWindows
 -          if (!parentQWindow->property("_q_platform_MacUseNSWindow").toBool()) {
 -              parentQWindow->setProperty("_q_platform_MacUseNSWindow", QVariant(true));
 - -            parentCocoaWindow->recreateWindowIfNeeded();
 - +            m_parentCocoaWindow->recreateWindowIfNeeded();
 -          }
 -      }
 -  
 - @@ -1713,8 +1718,8 @@ void QCocoaWindow::recreateWindowIfNeeded()
 -      if ((isContentView() && !shouldBeContentView) || (recreateReason & PanelChanged)) {
 -          qCDebug(lcQpaCocoaWindow) << "Getting rid of existing window" << m_nsWindow;
 -          [m_nsWindow closeAndRelease];
 - -        if (isChildNSWindow())
 - -            [m_view.window.parentWindow removeChildWindow:m_view.window];
 - +        if (isChildNSWindow() && oldParentCocoaWindow)
 - +            oldParentCocoaWindow->removeChildWindow(this);
 -          if (isContentView()) {
 -              // We explicitly disassociate m_view from the window's contentView,
 -              // as AppKit does not automatically do this in response to removing
 - @@ -1730,9 +1735,9 @@ void QCocoaWindow::recreateWindowIfNeeded()
 -          if (noPreviousWindow)
 -              m_nsWindow = createNSWindow(shouldBeChildNSWindow, shouldBePanel);
 -  
 - -        if (m_view.window.parentWindow) {
 - -            if (!shouldBeChildNSWindow || (recreateReason & ParentChanged))
 - -                [m_view.window.parentWindow removeChildWindow:m_view.window];
 - +        if (oldParentCocoaWindow) {
 - +            if (!shouldBeChildNSWindow || oldParentCocoaWindow != m_parentCocoaWindow)
 - +                oldParentCocoaWindow->removeChildWindow(this);
 -              m_forwardWindow = oldParentCocoaWindow;
 -          }
 -  
 - @@ -1759,8 +1764,8 @@ void QCocoaWindow::recreateWindowIfNeeded()
 -          setWindowState(window()->windowState());
 -      } else if (shouldBeChildNSWindow) {
 -          if (!m_hiddenByClipping) {
 - -            [parentCocoaWindow->m_nsWindow addChildWindow:m_nsWindow ordered:NSWindowAbove];
 - -            parentCocoaWindow->reinsertChildWindow(this);
 - +            [m_parentCocoaWindow->m_nsWindow addChildWindow:m_nsWindow ordered:NSWindowAbove];
 - +            m_parentCocoaWindow->reinsertChildWindow(this);
 -          }
 -  
 -          // Set properties after the window has been made a child NSWindow
 - @@ -1771,7 +1776,7 @@ void QCocoaWindow::recreateWindowIfNeeded()
 -          if ([m_view superview])
 -              [m_view removeFromSuperview];
 -  
 - -        [parentCocoaWindow->m_view addSubview:m_view];
 - +        [m_parentCocoaWindow->m_view addSubview:m_view];
 -          QRect rect = windowGeometry();
 -          // Prevent setting a (0,0) window size; causes opengl context
 -          // "Invalid Drawable" warnings.
 - @@ -1915,6 +1920,11 @@ bool QCocoaWindow::alwaysShowToolWindow() const
 -      return qt_mac_resolveOption(false, window(), "_q_macAlwaysShowToolWindow", "");
 -  }
 -  
 - +void QCocoaWindow::removeChildWindow(QCocoaWindow *child)
 - +{
 - +    [m_nsWindow removeChildWindow:child->m_nsWindow];
 - +}
 - +
 -  void QCocoaWindow::removeMonitor()
 -  {
 -      if (!monitor)
 - @@ -2046,12 +2056,14 @@ Qt::WindowState QCocoaWindow::windowState() const
 -      // FIXME: Support compound states (Qt::WindowStates)
 -  
 -      NSWindow *window = m_view.window;
 - +    /*
 -      if (window.miniaturized)
 -          return Qt::WindowMinimized;
 - +    */
 -      if (window.qt_fullScreen)
 -          return Qt::WindowFullScreen;
 - -    if ((window.zoomed && !isTransitioningToFullScreen())
 - -        || (m_lastReportedWindowState == Qt::WindowMaximized && isTransitioningToFullScreen()))
 - +    if (/*(window.zoomed && !isTransitioningToFullScreen())
 - +        ||*/ (m_lastReportedWindowState == Qt::WindowMaximized && isTransitioningToFullScreen()))
 -          return Qt::WindowMaximized;
 -  
 -      // Note: We do not report Qt::WindowActive, even if isActive()
 - @@ -2181,7 +2193,6 @@ void QCocoaWindow::applyContentBorderThickness(NSWindow *window)
 -      if (!m_drawContentBorderGradient) {
 -          [window setStyleMask:[window styleMask] & ~NSTexturedBackgroundWindowMask];
 -          [[[window contentView] superview] setNeedsDisplay:YES];
 - -        window.titlebarAppearsTransparent = NO;
 -          return;
 -      }
 -  
 - @@ -2206,7 +2217,6 @@ void QCocoaWindow::applyContentBorderThickness(NSWindow *window)
 -      int effectiveBottomContentBorderThickness = m_bottomContentBorderThickness;
 -  
 -      [window setStyleMask:[window styleMask] | NSTexturedBackgroundWindowMask];
 - -    window.titlebarAppearsTransparent = YES;
 -  
 -      [window setContentBorderThickness:effectiveTopContentBorderThickness forEdge:NSMaxYEdge];
 -      [window setAutorecalculatesContentBorderThickness:NO forEdge:NSMaxYEdge];
 
 
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