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diff --git a/src/sys/sys_osx.mm b/src/sys/sys_osx.mm
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+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+Copyright (C) 2000-2009 Darklegion Development
+Copyright (C) 2015-2019 GrangerHub
+
+
+This file is part of Tremulous.
+
+Tremulous 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 3 of the License,
+or (at your option) any later version.
+
+Tremulous 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 Tremulous; if not, see <https://www.gnu.org/licenses/>
+
+===========================================================================
+*/
+
+#ifndef __APPLE__
+#error This file is for Mac OS X only. You probably should not compile it.
+#endif
+
+// Please note that this file is just some Mac-specific bits. Most of the
+// Mac OS X code is shared with other Unix platforms in sys_unix.c ...
+
+#include "qcommon/q_shared.h"
+#include "qcommon/qcommon.h"
+#include "dialog.h"
+#include "sys_local.h"
+
+//#import <AppKit/AppKit.h>
+#import <Foundation/Foundation.h>
+#import <Carbon/Carbon.h>
+#import <Cocoa/Cocoa.h>
+//
+//#import <AppKit/AppKitDefines.h>
+//#import <Foundation/NSObject.h>
+//#import <Foundation/NSArray.h>
+//#import <Foundation/NSDictionary.h>
+//#import <AppKit/NSAlert.h>
+
+/*
+==============
+Sys_Dialog
+
+Display an OS X dialog box
+==============
+*/
+dialogResult_t Sys_Dialog( dialogType_t type, const char *message, const char *title )
+{
+	dialogResult_t result = DR_OK;
+	NSAlert *alert = [NSAlert new];
+
+	[alert setMessageText: [NSString stringWithUTF8String: title]];
+	[alert setInformativeText: [NSString stringWithUTF8String: message]];
+
+	if( type == DT_ERROR )
+		[alert setAlertStyle: NSCriticalAlertStyle];
+	else
+		[alert setAlertStyle: NSWarningAlertStyle];
+
+	switch( type )
+	{
+		default:
+			[alert runModal];
+			result = DR_OK;
+			break;
+
+		case DT_YES_NO:
+			[alert addButtonWithTitle: @"Yes"];
+			[alert addButtonWithTitle: @"No"];
+			switch( [alert runModal] )
+			{
+				default:
+				case NSAlertFirstButtonReturn: result = DR_YES; break;
+				case NSAlertSecondButtonReturn: result = DR_NO; break;
+			}
+			break;
+
+		case DT_OK_CANCEL:
+			[alert addButtonWithTitle: @"OK"];
+			[alert addButtonWithTitle: @"Cancel"];
+
+			switch( [alert runModal] )
+			{
+				default:
+				case NSAlertFirstButtonReturn: result = DR_OK; break;
+				case NSAlertSecondButtonReturn: result = DR_CANCEL; break;
+			}
+			break;
+	}
+
+	[alert release];
+
+	return result;
+}