In a large bowl, stir together cake mix, pudding mix, eggs, sour cream, oil, and shredded coconut.
Fold in the macadamia nuts and white chocolate chips.
Spread the batter evenly into a well-greased tube pan or angel food cake pan.
Sprinkle with turbinado sugar.
Bake at 350 degrees for 40-45 minutes, or until a toothpick inserted near center comes out clean, and the edges are golden brown.
Cool bread in pan for 30 minutes before removing to a wire rack to cool completely.
Meanwhile, prepare syrup.