diff --git a/src/plugins/platforms/cocoa/qcocoanativeinterface.h b/src/plugins/platforms/cocoa/qcocoanativeinterface.h
index 4a0cf112575..a406cae366c 100644
--- a/src/plugins/platforms/cocoa/qcocoanativeinterface.h
+++ b/src/plugins/platforms/cocoa/qcocoanativeinterface.h
@@ -31,12 +31,6 @@ public Q_SLOTS:
     void onAppFocusWindowChanged(QWindow *window);
 
 private:
-    /*
-        Function to return the default background pixmap.
-        Needed by QWizard in the Qt widget module.
-    */
-    Q_INVOKABLE QPixmap defaultBackgroundPixmapForQWizard();
-
     Q_INVOKABLE void clearCurrentThreadCocoaEventDispatcherInterruptFlag();
 
     static void registerDraggedTypes(const QStringList &types);
diff --git a/src/plugins/platforms/cocoa/qcocoanativeinterface.mm b/src/plugins/platforms/cocoa/qcocoanativeinterface.mm
index e95a3c03312..58bda2706af 100644
--- a/src/plugins/platforms/cocoa/qcocoanativeinterface.mm
+++ b/src/plugins/platforms/cocoa/qcocoanativeinterface.mm
@@ -75,35 +75,6 @@ QPlatformNativeInterface::NativeResourceForIntegrationFunction QCocoaNativeInter
     return nullptr;
 }
 
-QPixmap QCocoaNativeInterface::defaultBackgroundPixmapForQWizard()
-{
-    // Note: starting with macOS 10.14, the KeyboardSetupAssistant app bundle no
-    // longer contains the "Background.png" image. This function then returns a
-    // null pixmap.
-    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);
-        QCFType<CFBundleRef> bundle = CFBundleCreate(kCFAllocatorDefault, url);
-        if (bundle) {
-            url = CFBundleCopyResourceURL(bundle, CFSTR("Background"), CFSTR("png"), nullptr);
-            if (url) {
-                QCFType<CGImageSourceRef> imageSource = CGImageSourceCreateWithURL(url, nullptr);
-                QCFType<CGImageRef> image = CGImageSourceCreateImageAtIndex(imageSource, 0, nullptr);
-                if (image) {
-                    int width = CGImageGetWidth(image);
-                    int height = CGImageGetHeight(image);
-                    if (width == ExpectedImageWidth && height == ExpectedImageHeight)
-                        return QPixmap::fromImage(qt_mac_toQImage(image));
-                }
-            }
-        }
-    }
-    return QPixmap();
-}
-
 void QCocoaNativeInterface::clearCurrentThreadCocoaEventDispatcherInterruptFlag()
 {
     QCocoaEventDispatcher::clearCurrentThreadCocoaEventDispatcherInterruptFlag();
diff --git a/src/widgets/CMakeLists.txt b/src/widgets/CMakeLists.txt
index ed9086e19a9..417f6a2d8ee 100644
--- a/src/widgets/CMakeLists.txt
+++ b/src/widgets/CMakeLists.txt
@@ -684,15 +684,25 @@ qt_internal_extend_target(Widgets CONDITION QT_FEATURE_progressdialog
         dialogs/qprogressdialog.cpp dialogs/qprogressdialog.h
 )
 
-qt_internal_extend_target(Widgets CONDITION QT_FEATURE_wizard
-    SOURCES
-        dialogs/qwizard.cpp dialogs/qwizard.h
-)
+if(QT_FEATURE_wizard)
+    qt_internal_extend_target(Widgets CONDITION
+        SOURCES
+            dialogs/qwizard.cpp dialogs/qwizard.h
+    )
 
-qt_internal_extend_target(Widgets CONDITION QT_FEATURE_wizard AND WIN32
-    SOURCES
-        dialogs/qwizard_win.cpp dialogs/qwizard_win_p.h
-)
+    if(APPLE)
+        set_source_files_properties(dialogs/qwizard.cpp
+            PROPERTIES
+                COMPILE_FLAGS "-x objective-c++"
+                SKIP_PRECOMPILE_HEADERS ON
+        )
+    endif()
+
+    qt_internal_extend_target(Widgets CONDITION WIN32
+        SOURCES
+            dialogs/qwizard_win.cpp dialogs/qwizard_win_p.h
+    )
+endif()
 
 qt_internal_extend_target(Widgets CONDITION QT_FEATURE_accessibility
     SOURCES
diff --git a/src/widgets/dialogs/qwizard.cpp b/src/widgets/dialogs/qwizard.cpp
index 7cb28314116..da084d412d5 100644
--- a/src/widgets/dialogs/qwizard.cpp
+++ b/src/widgets/dialogs/qwizard.cpp
@@ -29,9 +29,8 @@
 #include "qstyleoption.h"
 #include "qvarlengtharray.h"
 #if defined(Q_OS_MACOS)
-#include <QtCore/QMetaMethod>
-#include <QtGui/QGuiApplication>
-#include <qpa/qplatformnativeinterface.h>
+#include <AppKit/AppKit.h>
+#include <QtGui/private/qcoregraphics_p.h>
 #elif QT_CONFIG(style_windowsvista)
 #include "qwizard_win_p.h"
 #include "qtimer.h"
@@ -1723,23 +1722,19 @@ void QWizardPrivate::setStyle(QStyle *style)
 }
 
 #ifdef Q_OS_MACOS
-
 QPixmap QWizardPrivate::findDefaultBackgroundPixmap()
 {
-    QGuiApplication *app = qobject_cast<QGuiApplication *>(QCoreApplication::instance());
-    if (!app)
-        return QPixmap();
-    QPlatformNativeInterface *platformNativeInterface = app->platformNativeInterface();
-    int at = platformNativeInterface->metaObject()->indexOfMethod("defaultBackgroundPixmapForQWizard()");
-    if (at == -1)
-        return QPixmap();
-    QMetaMethod defaultBackgroundPixmapForQWizard = platformNativeInterface->metaObject()->method(at);
-    QPixmap result;
-    if (!defaultBackgroundPixmapForQWizard.invoke(platformNativeInterface, Q_RETURN_ARG(QPixmap, result)))
-        return QPixmap();
-    return result;
-}
+    auto *keyboardAssistantURL = [NSWorkspace.sharedWorkspace
+        URLForApplicationWithBundleIdentifier:@"com.apple.KeyboardSetupAssistant"];
+    auto *keyboardAssistantBundle = [NSBundle bundleWithURL:keyboardAssistantURL];
+    auto *assistantBackground = [keyboardAssistantBundle imageForResource:@"Background"];
+    auto size = QSizeF::fromCGSize(assistantBackground.size);
+    static const QSizeF expectedSize(242, 414);
+    if (size == expectedSize)
+        return qt_mac_toQPixmap(assistantBackground, size);
 
+    return QPixmap();
+}
 #endif
 
 #if QT_CONFIG(style_windowsvista)
@@ -2845,7 +2840,7 @@ void QWizard::setPixmap(WizardPixmap which, const QPixmap &pixmap)
     Returns the pixmap set for role \a which.
 
     By default, the only pixmap that is set is the BackgroundPixmap on
-    \macos version 10.13 and earlier.
+    \macos.
 
     \sa QWizardPage::pixmap(), {Elements of a Wizard Page}
 */
diff --git a/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp b/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp
index a9d5359318f..8739a012773 100644
--- a/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp
+++ b/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp
@@ -398,7 +398,7 @@ void tst_QWizard::setPixmap()
     QVERIFY(wizard.pixmap(QWizard::BannerPixmap).isNull());
     QVERIFY(wizard.pixmap(QWizard::LogoPixmap).isNull());
     QVERIFY(wizard.pixmap(QWizard::WatermarkPixmap).isNull());
-    if (QOperatingSystemVersion::current() <= QOperatingSystemVersion::MacOSHighSierra)
+    if (QOperatingSystemVersion::currentType() == QOperatingSystemVersion::MacOS)
         QVERIFY(!wizard.pixmap(QWizard::BackgroundPixmap).isNull());
     else
         QVERIFY(wizard.pixmap(QWizard::BackgroundPixmap).isNull());
@@ -406,7 +406,7 @@ void tst_QWizard::setPixmap()
     QVERIFY(page->pixmap(QWizard::BannerPixmap).isNull());
     QVERIFY(page->pixmap(QWizard::LogoPixmap).isNull());
     QVERIFY(page->pixmap(QWizard::WatermarkPixmap).isNull());
-    if (QOperatingSystemVersion::current() <= QOperatingSystemVersion::MacOSHighSierra)
+    if (QOperatingSystemVersion::currentType() == QOperatingSystemVersion::MacOS)
         QVERIFY(!wizard.pixmap(QWizard::BackgroundPixmap).isNull());
     else
         QVERIFY(page->pixmap(QWizard::BackgroundPixmap).isNull());