Heat oven to 425°F. Line broiler pan with foil; spray broiler pan rack with cooking spray. Place turkey, breast side up, on rack in pan. Rub turkey all over with softened butter. Sprinkle with 1/2 teaspoon each of the salt and pepper. Roast uncovered 30 minutes. Reduce oven temperature to 350°F.
In small bowl, mix syrup, jelly, melted butter, chopped rosemary, and remaining 1/2 teaspoon each salt and pepper. Baste turkey with some of the syrup mixture.
Roast uncovered 55 minutes longer or until thermometer reads at least 165°F, basting with remaining syrup mixture 3 times during last 15 minutes of roasting. Let stand 15 minutes before carving. Garnish platter with rosemary sprigs and apples.