Prepare garnish by threading mango cubes onto fresh rosemary spears and set aside.
Add fresh or frozen mango, lime juice, orange juice, and water to a blender and pulse to combine. For an adults-only variation, add four ounces of tequila, as well.
Add ice and pulse for a few seconds, just until the ice is crushed into small pieces. Do not over-blend.
Pour into serving glasses and garnish with rosemary-mango spears. Serve immediately and enjoy!