diff --git a/atom/browser/api/atom_api_system_preferences.h b/atom/browser/api/atom_api_system_preferences.h
index 658f6eebb402..872f822ed74b 100644
--- a/atom/browser/api/atom_api_system_preferences.h
+++ b/atom/browser/api/atom_api_system_preferences.h
@@ -73,7 +73,7 @@ class SystemPreferences : public mate::EventEmitter<SystemPreferences>
   void UnsubscribeLocalNotification(int request_id);
   v8::Local<v8::Value> GetUserDefault(const std::string& name,
                                       const std::string& type);
-  void registerDefaults(const base::DictionaryValue& defaults);
+  void RegisterDefaults(const base::DictionaryValue& defaults);
   void SetUserDefault(const std::string& name,
                       const std::string& type,
                       mate::Arguments* args);
diff --git a/atom/browser/api/atom_api_system_preferences_mac.mm b/atom/browser/api/atom_api_system_preferences_mac.mm
index 1317b3026e2b..8f1df7746ff9 100644
--- a/atom/browser/api/atom_api_system_preferences_mac.mm
+++ b/atom/browser/api/atom_api_system_preferences_mac.mm
@@ -145,21 +145,11 @@ v8::Local<v8::Value> SystemPreferences::GetUserDefault(
 }
 
 void SystemPreferences::RegisterDefaults(const base::DictionaryValue& defaults) {
-  NSString *userDefaultsValuesPath;
-    NSDictionary *userDefaultsValuesDict;
-    NSDictionary *initialValuesDict;
-    NSArray *resettableUserDefaultsKeys;
-
-    userDefaultsValuesPath=[[NSBundle mainBundle] pathForResource:@"UserDefaults"
-                               ofType:@"plist"];
-    userDefaultsValuesDict=[NSDictionary dictionaryWithContentsOfFile:userDefaultsValuesPath];
-
-    [[NSUserDefaults standardUserDefaults] registerDefaults:userDefaultsValuesDict];
-
-    resettableUserDefaultsKeys=[NSArray arrayWithObjects:@"Value1",@"Value2",@"Value3",nil];
-    initialValuesDict=[userDefaultsValuesDict dictionaryWithValuesForKeys:resettableUserDefaultsKeys];
-
-    [[NSUserDefaultsController sharedUserDefaultsController] setInitialValues:initialValuesDict];
+  if (NSDictionary* defaultsDict = DictionaryValueToNSDictionary(defaults)) {
+    [[NSUserDefaults standardUserDefaults] registerDefaults:defaultsDict];
+  } else {
+    defaults->ThrowError("Unable to parse userDefaults");
+  }
 }
 
 void SystemPreferences::SetUserDefault(const std::string& name,