diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
index 66baf16..89794ef 100644
--- a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
+++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
@@ -830,7 +830,7 @@ void QCoreTextFontEngine::getUnscaledGlyph(glyph_t glyph, QPainterPath *path, gl
 
 QFixed QCoreTextFontEngine::emSquareSize() const
 {
-    return QFixed::QFixed(int(CTFontGetUnitsPerEm(ctfont)));
+    return QFixed(int(CTFontGetUnitsPerEm(ctfont)));
 }
 
 QFontEngine *QCoreTextFontEngine::cloneWithSize(qreal pixelSize) const
diff --git a/src/plugins/bearer/corewlan/qcorewlanengine.mm b/src/plugins/bearer/corewlan/qcorewlanengine.mm
index 341d3bccf2..3368234c26 100644
--- a/src/plugins/bearer/corewlan/qcorewlanengine.mm
+++ b/src/plugins/bearer/corewlan/qcorewlanengine.mm
@@ -287,7 +287,7 @@ void QScanThread::getUserConfigurations()
     QMacAutoReleasePool pool;
     userProfiles.clear();
 
-    NSArray<NSString *> *wifiInterfaces = [CWWiFiClient interfaceNames];
+    NSArray *wifiInterfaces = [CWWiFiClient interfaceNames];
     for (NSString *ifName in wifiInterfaces) {
 
         CWInterface *wifiInterface = [[CWWiFiClient sharedWiFiClient] interfaceWithName:ifName];
@@ -602,7 +602,7 @@ void QCoreWlanEngine::doRequestUpdate()
 
     QMacAutoReleasePool pool;
 
-    NSArray<NSString *> *wifiInterfaces = [CWWiFiClient interfaceNames];
+    NSArray *wifiInterfaces = [CWWiFiClient interfaceNames];
     for (NSString *ifName in wifiInterfaces) {
             scanThread->interfaceName = QString::fromNSString(ifName);
             scanThread->start();
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
index d1f19f2..1ac2cf1 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -1699,7 +1699,7 @@ void QCocoaWindow::applyContentBorderThickness(NSWindow *window)

     if (!m_drawContentBorderGradient) {
         window.styleMask = window.styleMask & ~NSTexturedBackgroundWindowMask;
-        [window.contentView.superview setNeedsDisplay:YES];
+        [[window.contentView superview] setNeedsDisplay:YES];
         window.titlebarAppearsTransparent = NO;
         return;
     }
diff --git a/src/plugins/platforms/cocoa/qnswindow.mm b/src/plugins/platforms/cocoa/qnswindow.mm
index e846fa0..4171cd4 100644
--- a/src/plugins/platforms/cocoa/qnswindow.mm
+++ b/src/plugins/platforms/cocoa/qnswindow.mm
@@ -224,7 +224,7 @@ static bool isMouseEvent(NSEvent *ev)
     if (pw->frameStrutEventsEnabled() && isMouseEvent(theEvent)) {
         NSPoint loc = [theEvent locationInWindow];
         NSRect windowFrame = [self convertRectFromScreen:self.frame];
-        NSRect contentFrame = self.contentView.frame;
+        NSRect contentFrame = [self.contentView frame];
         if (NSMouseInRect(loc, windowFrame, NO) && !NSMouseInRect(loc, contentFrame, NO))
             [qnsview_cast(pw->view()) handleFrameStrutMouseEvent:theEvent];
     }
@@ -253,7 +253,7 @@ static bool isMouseEvent(NSEvent *ev)
 + (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)