In 2-quart saucepan, mix mango, pineapple, 3/4 cup sugar and the cream of coconut. In small bowl, mix cornstarch and salt; stir into fruit mixture. Cook over medium-low heat, stirring constantly, until thickened. Stir in butter until melted. Pour over cream cheese mixture. Top with second crust and flute; cut slits in several places. Brush with milk, sprinkle with 1 teaspoon sugar and the macadamia nuts.