diff --git a/src/gui/platform/darwin/qmacmimeregistry.mm b/src/gui/platform/darwin/qmacmimeregistry.mm
index bf69a117b2..14c2ce9978 100644
--- a/src/gui/platform/darwin/qmacmimeregistry.mm
+++ b/src/gui/platform/darwin/qmacmimeregistry.mm
@@ -77,24 +77,6 @@ void destroyMimeTypes()
         delete mimes->takeFirst();
 }
 
-/*
-  Returns the most-recently created QMacPasteboardMime of type \a t that can convert
-  between the \a mime and \a flav formats.  Returns 0 if no such convertor
-  exists.
-*/
-QMacInternalPasteboardMime *convertor(uchar t, const QString &mime, QString flav)
-{
-    MimeList *mimes = globalMimeList();
-    for (MimeList::const_iterator it = mimes->constBegin(); it != mimes->constEnd(); ++it) {
-#ifdef DEBUG_MIME_MAPS
-        qDebug("QMacMimeRegistry::convertor: seeing if converter(%d) can convert %s to %s [%d]",
-              (*it)->type() & t, qPrintable(mime), qPrintable(flav), (*it)->canConvert(mime,flav));
-#endif
-        if (((*it)->type() & t) && (*it)->canConvert(mime, flav))
-            return (*it);
-    }
-    return 0;
-}
 /*
   Returns a MIME type of type \a t for \a flav, or 0 if none exists.
 */
diff --git a/src/gui/platform/darwin/qmacmimeregistry_p.h b/src/gui/platform/darwin/qmacmimeregistry_p.h
index 8e2a3f7d7a..32dcd221a5 100644
--- a/src/gui/platform/darwin/qmacmimeregistry_p.h
+++ b/src/gui/platform/darwin/qmacmimeregistry_p.h
@@ -32,7 +32,6 @@ namespace QMacMimeRegistry {
     Q_GUI_EXPORT void unregisterMimeConverter(QMacInternalPasteboardMime *);
 
     Q_GUI_EXPORT QList<QMacInternalPasteboardMime *> all(uchar);
-    Q_GUI_EXPORT QMacInternalPasteboardMime *convertor(uchar, const QString &mime, QString flav);
     Q_GUI_EXPORT QString flavorToMime(uchar, QString flav);
 
     Q_GUI_EXPORT void registerDraggedTypes(const QStringList &types);
diff --git a/src/plugins/platforms/cocoa/qmacclipboard.mm b/src/plugins/platforms/cocoa/qmacclipboard.mm
index 6adc2ce145..9900d0e6a9 100644
--- a/src/plugins/platforms/cocoa/qmacclipboard.mm
+++ b/src/plugins/platforms/cocoa/qmacclipboard.mm
@@ -299,7 +299,7 @@ QMacPasteboard::setMimeData(QMimeData *mime_src, DataRequestType dataRequestType
     delete mime;
     mime = mime_src;
 
-    QList<QMacInternalPasteboardMime*> availableConverters = QMacMimeRegistry::all(mime_type);
+    const QList<QMacInternalPasteboardMime*> availableConverters = QMacMimeRegistry::all(mime_type);
     if (mime != nullptr) {
         clear_helper();
         QStringList formats = mime_src->formats();
@@ -316,8 +316,7 @@ QMacPasteboard::setMimeData(QMimeData *mime_src, DataRequestType dataRequestType
         }
         for (int f = 0; f < formats.size(); ++f) {
             QString mimeType = formats.at(f);
-            for (QList<QMacInternalPasteboardMime *>::Iterator it = availableConverters.begin(); it != availableConverters.end(); ++it) {
-                QMacInternalPasteboardMime *c = (*it);
+            for (auto *c : availableConverters) {
                 // Hack: The Rtf handler converts incoming Rtf to Html. We do
                 // not want to convert outgoing Html to Rtf but instead keep
                 // posting it as Html. Skip the Rtf handler here.
@@ -434,9 +433,8 @@ QMacPasteboard::retrieveData(const QString &format, QMetaType) const
         return QByteArray();
 
     qCDebug(lcQpaClipboard, "Pasteboard: retrieveData [%s]", qPrintable(format));
-    const QList<QMacInternalPasteboardMime *> mimes = QMacMimeRegistry::all(mime_type);
-    for (int mime = 0; mime < mimes.size(); ++mime) {
-        QMacInternalPasteboardMime *c = mimes.at(mime);
+    const QList<QMacInternalPasteboardMime *> availableConverters = QMacMimeRegistry::all(mime_type);
+    for (const auto *c : availableConverters) {
         QString c_flavor = c->flavorFor(format);
         if (!c_flavor.isEmpty()) {
             // Converting via PasteboardCopyItemFlavorData below will for some UITs result