diff --git a/desmume/src/cocoa/DeleteUserDefaults.applescript b/desmume/src/cocoa/DeleteUserDefaults.applescript
new file mode 100644
index 000000000..09bc69db9
--- /dev/null
+++ b/desmume/src/cocoa/DeleteUserDefaults.applescript
@@ -0,0 +1,39 @@
+(*
+	Copyright (C) 2013 DeSmuME team
+
+	This file is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+
+	This file is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with the this software.  If not, see <http://www.gnu.org/licenses/>.
+ *)
+
+display dialog "Are you sure that you want to delete DeSmuME's preferences?" buttons {"Cancel", "Delete"} default button "Delete" cancel button "Cancel" with title "Delete DeSmuME Preferences"
+
+try
+	set userDefaultsPath to ((path to "pref" as text) & "org.desmume.DeSmuME.plist")
+	set isUserDefaultsDeleted to false
+	
+	tell application "Finder"
+		if exists file userDefaultsPath then
+			set isUserDefaultsDeleted to true
+			delete file userDefaultsPath
+		end if
+		
+		if isUserDefaultsDeleted then
+			display dialog "The preference files have been moved to the Trash." buttons {"OK"} default button {"OK"}
+		else
+			display dialog "No preference files were found." buttons {"OK"} default button {"OK"}
+		end if
+	end tell
+	
+on error errorMsg
+	display dialog errorMsg
+end try
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