--- src/gui/osutils/macutils/AppKitImpl.mm
+++ src/gui/osutils/macutils/AppKitImpl.mm
@@ -66,7 +66,7 @@
 
 - (void) observeValueForKeyPath:(NSString *)keyPath
                       ofObject:(id)object
-                        change:(NSDictionary<NSKeyValueChangeKey,id> *)change
+                        change:(NSDictionary *)change
                        context:(void *)context
 {
     Q_UNUSED(object)
@@ -80,8 +80,10 @@
             };
 
             if(@available(macOS 11.0, *)) {
+#if __clang_major__ >= 9 && MAC_OS_X_VERSION_MIN_REQUIRED >= 101400
                 // Not sure why exactly this call is needed, but Apple sample code uses it so it's best to use it here too
                 [NSApp.effectiveAppearance performAsCurrentDrawingAppearance:emitBlock];
+#endif
             }
             else {
                 emitBlock();
@@ -139,7 +141,11 @@
 //
 - (bool) isDarkMode
 {
+#if __clang_major__ >= 9 && MAC_OS_X_VERSION_MIN_REQUIRED >= 101400
     return [NSApp.effectiveAppearance.name isEqualToString:NSAppearanceNameDarkAqua];
+#else
+    return false;
+#endif
 }