--- a/widget/cocoa/nsDeviceContextSpecX.mm
+++ b/widget/cocoa/nsDeviceContextSpecX.mm
@@ -118,36 +118,43 @@ NS_IMETHODIMP nsDeviceContextSpecX::Init
   }
 #endif
 
   return NS_OK;
 
   NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
 }
 
-NS_IMETHODIMP nsDeviceContextSpecX::BeginDocument(const nsAString& aTitle, 
+NS_IMETHODIMP nsDeviceContextSpecX::BeginDocument(const nsAString& aTitle,
                                                   const nsAString& aPrintToFileName,
-                                                  int32_t          aStartPage, 
+                                                  int32_t          aStartPage,
                                                   int32_t          aEndPage)
 {
-    NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
+
+  // Print Core of Application Service sent print job with names exceeding
+  // 255 bytes. This is a workaround until fix it.
+  // (https://openradar.appspot.com/34428043)
+  nsAutoString adjustedTitle;
+  PrintTarget::AdjustPrintJobNameForIPP(aTitle, adjustedTitle);
 
-    if (!aTitle.IsEmpty()) {
-      CFStringRef cfString =
-        ::CFStringCreateWithCharacters(NULL, reinterpret_cast<const UniChar*>(aTitle.BeginReading()),
-                                             aTitle.Length());
-      if (cfString) {
-        ::PMPrintSettingsSetJobName(mPrintSettings, cfString);
-        ::CFRelease(cfString);
-      }
+  if (!adjustedTitle.IsEmpty()) {
+    CFStringRef cfString =
+      ::CFStringCreateWithCharacters(NULL,
+                                     reinterpret_cast<const UniChar*>(adjustedTitle.BeginReading()),
+                                     adjustedTitle.Length());
+    if (cfString) {
+      ::PMPrintSettingsSetJobName(mPrintSettings, cfString);
+      ::CFRelease(cfString);
     }
+  }
 
-    return NS_OK;
+  return NS_OK;
 
-    NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
+  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
 }
 
 NS_IMETHODIMP nsDeviceContextSpecX::EndDocument()
 {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
 
 #ifdef MOZ_ENABLE_SKIA_PDF
   if (mPrintViaSkPDF) {

--- a/widget/cocoa/nsPrintDialogX.mm
+++ b/widget/cocoa/nsPrintDialogX.mm
@@ -54,18 +54,26 @@ nsPrintDialogServiceX::Show(nsPIDOMWindo
   nsCOMPtr<nsIPrintSettingsService> printSettingsSvc
     = do_GetService("@mozilla.org/gfx/printsettings-service;1");
 
   // Set the print job title
   char16_t** docTitles;
   uint32_t titleCount;
   nsresult rv = aWebBrowserPrint->EnumerateDocumentNames(&titleCount, &docTitles);
   if (NS_SUCCEEDED(rv) && titleCount > 0) {
-    CFStringRef cfTitleString = CFStringCreateWithCharacters(NULL, reinterpret_cast<const UniChar*>(docTitles[0]),
-                                                             NS_strlen(docTitles[0]));
+    // Print Core of Application Service sent print job with names exceeding
+    // 255 bytes. This is a workaround until fix it.
+    // (https://openradar.appspot.com/34428043)
+    nsAutoString adjustedTitle;
+    PrintTarget::AdjustPrintJobNameForIPP(nsDependentString(docTitles[0]),
+                                          adjustedTitle);
+    CFStringRef cfTitleString =
+      CFStringCreateWithCharacters(NULL,
+                                   reinterpret_cast<const UniChar*>(adjustedTitle.BeginReading()),
+                                   adjustedTitle.Length());
     if (cfTitleString) {
       ::PMPrintSettingsSetJobName(settingsX->GetPMPrintSettings(), cfTitleString);
       CFRelease(cfTitleString);
     }
     for (int32_t i = titleCount - 1; i >= 0; i--) {
       free(docTitles[i]);
     }
     free(docTitles);