Line two baking sheets with parchment paper. Set aside.
Combine water, sugar, corn syrup and salt in a small saucepan.
Bring to a boil over medium-high heat, stirring frequently to dissolve sugar. Remove from heat.
In a medium-sized, heat-proof bowl, combine shredded coconut and hot syrup, stirring until evenly distributed. Let mixture cool for 20 minutes.
Preheat oven to 350 degrees.
In a separate bowl, whisk egg whites and vanilla extract together until foamy and thick.
Gently fold in the coconut mixture.
Use a cookie scoop to scoop out mounds of the coconut mixture. You want golf-ball sized mounds. Space the macaroons 2 inches apart.
Bake until nice and golden brown, 14-18 minutes, rotating baking sheet if necessary. Place baking sheets on racks and let cool completely.
Store in an airtight container.