diff --git a/src/corelib/platform/darwin/qdarwinpermissionplugin_location.mm b/src/corelib/platform/darwin/qdarwinpermissionplugin_location.mm
index 1d32c0fcacb..4aa35f3920f 100644
--- a/src/corelib/platform/darwin/qdarwinpermissionplugin_location.mm
+++ b/src/corelib/platform/darwin/qdarwinpermissionplugin_location.mm
@@ -103,19 +103,15 @@ struct PermissionRequest
 
 - (CLAuthorizationStatus)authorizationStatus
 {
-    if (self.manager) {
-        if (@available(macOS 11, iOS 14, *))
-            return self.manager.authorizationStatus;
-    }
+    if (self.manager)
+        return self.manager.authorizationStatus;
 
     return QT_IGNORE_DEPRECATIONS(CLLocationManager.authorizationStatus);
 }
 
 - (Qt::PermissionStatus)accuracyAuthorization:(QLocationPermission)permission
 {
-    auto status = CLAccuracyAuthorizationReducedAccuracy;
-    if (@available(macOS 11, iOS 14, *))
-        status = self.manager.accuracyAuthorization;
+    auto status = self.manager.accuracyAuthorization;
 
     switch (status) {
     case CLAccuracyAuthorizationFullAccuracy:
diff --git a/src/gui/platform/darwin/qapplekeymapper.mm b/src/gui/platform/darwin/qapplekeymapper.mm
index b8ff5c9d6dd..9166d8baba3 100644
--- a/src/gui/platform/darwin/qapplekeymapper.mm
+++ b/src/gui/platform/darwin/qapplekeymapper.mm
@@ -455,23 +455,21 @@ const QAppleKeyMapper::KeyMap &QAppleKeyMapper::keyMapForKey(VirtualKeyCode virt
         if (err == noErr && actualStringLength)
             carbonUnicodeKey = QChar(unicodeString[0]);
 
-        if (@available(macOS 10.15, *)) {
-            if (canMapCocoaEvent) {
-                // Until we've verified that the Cocoa API works as expected
-                // we first run the event through the Carbon APIs and then
-                // compare the results to Cocoa.
-                auto cocoaModifiers = toCocoaModifiers(qtModifiers);
-                auto *charactersWithModifiers = [NSApp.currentEvent charactersByApplyingModifiers:cocoaModifiers];
+        if (canMapCocoaEvent) {
+            // Until we've verified that the Cocoa API works as expected
+            // we first run the event through the Carbon APIs and then
+            // compare the results to Cocoa.
+            auto cocoaModifiers = toCocoaModifiers(qtModifiers);
+            auto *charactersWithModifiers = [NSApp.currentEvent charactersByApplyingModifiers:cocoaModifiers];
 
-                QChar cocoaUnicodeKey;
-                if (charactersWithModifiers.length > 0)
-                    cocoaUnicodeKey = QChar([charactersWithModifiers characterAtIndex:0]);
+            QChar cocoaUnicodeKey;
+            if (charactersWithModifiers.length > 0)
+                cocoaUnicodeKey = QChar([charactersWithModifiers characterAtIndex:0]);
 
-                if (cocoaUnicodeKey != carbonUnicodeKey) {
-                    qCWarning(lcQpaKeyMapper) << "Mismatch between Cocoa" << cocoaUnicodeKey
-                        << "and Carbon" << carbonUnicodeKey << "for virtual key" << virtualKey
-                        << "with" << qtModifiers;
-                }
+            if (cocoaUnicodeKey != carbonUnicodeKey) {
+                qCWarning(lcQpaKeyMapper) << "Mismatch between Cocoa" << cocoaUnicodeKey
+                    << "and Carbon" << carbonUnicodeKey << "for virtual key" << virtualKey
+                    << "with" << qtModifiers;
             }
         }
 
diff --git a/src/gui/text/coretext/qcoretextfontdatabase.mm b/src/gui/text/coretext/qcoretextfontdatabase.mm
index 19f3a2b3352..2197c83f293 100644
--- a/src/gui/text/coretext/qcoretextfontdatabase.mm
+++ b/src/gui/text/coretext/qcoretextfontdatabase.mm
@@ -951,15 +951,13 @@ void QCoreTextFontDatabase::populateThemeFonts()
             };
 
             // Try populating the font variants based on its UI design trait, if available
-            if (@available(macos 10.15, ios 13.0, *)) {
-                auto fontTraits = QCFType<CFDictionaryRef>(CTFontDescriptorCopyAttribute(fontDescriptor, kCTFontTraitsAttribute));
-                static const NSString *kUIFontDesignTrait = @"NSCTFontUIFontDesignTrait";
-                if (id uiFontDesignTrait = fontTraits.as<NSDictionary*>()[kUIFontDesignTrait]) {
-                    QCFType<CTFontDescriptorRef> designTraitDescriptor = CTFontDescriptorCreateWithAttributes(
-                        CFDictionaryRef(@{ (id)kCTFontTraitsAttribute: @{ kUIFontDesignTrait: uiFontDesignTrait }
-                    }));
-                    addFontVariants(designTraitDescriptor);
-                }
+            auto fontTraits = QCFType<CFDictionaryRef>(CTFontDescriptorCopyAttribute(fontDescriptor, kCTFontTraitsAttribute));
+            static const NSString *kUIFontDesignTrait = @"NSCTFontUIFontDesignTrait";
+            if (id uiFontDesignTrait = fontTraits.as<NSDictionary*>()[kUIFontDesignTrait]) {
+                QCFType<CTFontDescriptorRef> designTraitDescriptor = CTFontDescriptorCreateWithAttributes(
+                    CFDictionaryRef(@{ (id)kCTFontTraitsAttribute: @{ kUIFontDesignTrait: uiFontDesignTrait }
+                }));
+                addFontVariants(designTraitDescriptor);
             }
 
             if (themeFontVariants.isEmpty()) {
diff --git a/src/plugins/platforms/cocoa/qcocoamessagedialog.mm b/src/plugins/platforms/cocoa/qcocoamessagedialog.mm
index 84525099c96..f786fc65c45 100644
--- a/src/plugins/platforms/cocoa/qcocoamessagedialog.mm
+++ b/src/plugins/platforms/cocoa/qcocoamessagedialog.mm
@@ -170,8 +170,7 @@ bool QCocoaMessageDialog::show(Qt::WindowFlags windowFlags, Qt::WindowModality w
         else if ([button.keyEquivalent isEqualToString:@"\e"])
             button.keyEquivalent = @"";
 
-        if (@available(macOS 11, *))
-            button.hasDestructiveAction = role == DestructiveRole;
+        button.hasDestructiveAction = role == DestructiveRole;
 
         // The NSModalResponse of showing an NSAlert normally depends on the order of the
         // button that was clicked, starting from the right with NSAlertFirstButtonReturn (1000),
diff --git a/src/plugins/platforms/cocoa/qcocoascreen.mm b/src/plugins/platforms/cocoa/qcocoascreen.mm
index 2249658189e..55526d6cdc7 100644
--- a/src/plugins/platforms/cocoa/qcocoascreen.mm
+++ b/src/plugins/platforms/cocoa/qcocoascreen.mm
@@ -197,38 +197,6 @@ QCocoaScreen::~QCocoaScreen()
          dispatch_release(m_displayLinkSource);
 }
 
-static QString displayName(CGDirectDisplayID displayID)
-{
-    QIOType<io_iterator_t> iterator;
-    if (IOServiceGetMatchingServices(kIOMainPortDefault,
-        IOServiceMatching("IODisplayConnect"), &iterator))
-        return QString();
-
-    QIOType<io_service_t> display;
-    while ((display = IOIteratorNext(iterator)) != 0)
-    {
-        NSDictionary *info = [(__bridge NSDictionary*)IODisplayCreateInfoDictionary(
-            display, kIODisplayOnlyPreferredName) autorelease];
-
-        if ([[info objectForKey:@kDisplayVendorID] unsignedIntValue] != CGDisplayVendorNumber(displayID))
-            continue;
-
-        if ([[info objectForKey:@kDisplayProductID] unsignedIntValue] != CGDisplayModelNumber(displayID))
-            continue;
-
-        if ([[info objectForKey:@kDisplaySerialNumber] unsignedIntValue] != CGDisplaySerialNumber(displayID))
-            continue;
-
-        NSDictionary *localizedNames = [info objectForKey:@kDisplayProductName];
-        if (![localizedNames count])
-            break; // Correct screen, but no name in dictionary
-
-        return QString::fromNSString([localizedNames objectForKey:[[localizedNames allKeys] objectAtIndex:0]]);
-    }
-
-    return QString();
-}
-
 void QCocoaScreen::update(CGDirectDisplayID displayId)
 {
     if (displayId != m_displayId) {
@@ -274,11 +242,7 @@ void QCocoaScreen::update(CGDirectDisplayID displayId)
     float refresh = CGDisplayModeGetRefreshRate(displayMode);
     m_refreshRate = refresh > 0 ? refresh : 60.0;
     m_rotation = CGDisplayRotation(displayId);
-
-    if (@available(macOS 10.15, *))
-        m_name = QString::fromNSString(nsScreen.localizedName);
-    else
-        m_name = displayName(m_displayId);
+    m_name = QString::fromNSString(nsScreen.localizedName);
 
     const bool didChangeGeometry = m_geometry != previousGeometry || m_availableGeometry != previousAvailableGeometry;