diff --git a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm
index fbd836f..9426cf1 100644
--- a/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm
+++ b/src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm
@@ -480,9 +480,27 @@ QStringList QCoreTextFontDatabase::addApplicationFont(const QByteArray &fontData
                 CGFontRelease(cgFont);
             }
         } else {
+            // CTFontManagerRegisterFontsForURL() outputs console errors if the font URL is already loaded.
+            // So, check whether the font is loaded before trying to register it.
+            CFStringRef fileNameCFString = QCFString::toCFStringRef(fileName);
+            CFArrayRef availableFonts = CTFontManagerCopyAvailableFontURLs();
+            CFIndex availableFontCount = CFArrayGetCount(availableFonts);
+            CFIndex i;
+            bool fontAlreadyLoaded = false;
+            for (i=0; i<availableFontCount; ++i) {
+                CFURLRef availableFontURL = (CFURLRef)CFArrayGetValueAtIndex(availableFonts, i);
+                CFStringRef availableFontPath = CFURLCopyFileSystemPath(availableFontURL, kCFURLPOSIXPathStyle);
+                if (CFStringCompare(fileNameCFString, availableFontPath, 0) == kCFCompareEqualTo) {
+                    fontAlreadyLoaded = true;
+                    break;
+                }
+                CFRelease(availableFontPath);
+            }
+            CFRelease(availableFonts);
+
             CFErrorRef error;
             QCFType<CFURLRef> fontURL = CFURLCreateWithFileSystemPath(NULL, QCFString(fileName), kCFURLPOSIXPathStyle, false);
-            bool success = CTFontManagerRegisterFontsForURL(fontURL, kCTFontManagerScopeProcess, &error);
+            bool success = fontAlreadyLoaded ? TRUE : CTFontManagerRegisterFontsForURL(fontURL, kCTFontManagerScopeProcess, &error);
             if (success) {
                 const void *keys[] = { fontURL };
                 const void *values[] = { kCTFontURLAttribute };