Add Mac platform

Source/Engine/Engine/Game.h

@@ -22,6 +22,8 @@
 #include "Android/AndroidGame.h"
 #elif PLATFORM_SWITCH
 #include "Platforms/Switch/Engine/Engine/SwitchGame.h"
+#elif PLATFORM_MAC
+#include "Mac/MacGame.h"
 #else
 #error Missing Game implementation!
 #endif

Source/Engine/Engine/Mac/MacGame.h

@@ -0,0 +1,19 @@
+// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#if PLATFORM_MAC && !USE_EDITOR
+
+#include "../Base/GameBase.h"
+
+/// <summary>
+/// The game class implementation for Mac platform.
+/// </summary>
+/// <seealso cref="Game" />
+class MacGame : public GameBase
+{
+};
+
+typedef MacGame Game;
+
+#endif