Preheat oven to 350 degrees F and spread coconut on a 2 baking sheets. Toast for 2-4 minutes or until just slightly golden brown. Reduce oven temperature to 325 degrees F.
Transfer coconut to a food processor (or a mixing bowl) and add just under half of the maple syrup (3 tbsp. maple syrup). Pulse a few times (or stir) to combine, being careful not to overmix. This will slightly moisten and sweeten the coconut. Set aside.
To a large mixing bowl, add aquafaba and cream of tartar (optional), and whip with a hand or stand mixer (you can whisk by hand, but it takes longer).
Once fluffy and semi-stiff peaks have formed), add remaining maple syrup (5 Tbsp.), vanilla, and salt and whip again to combine. At this point, taste your aquafaba and see if it needs any more sweetness. You can add a bit more maple syrup, but don’t go overboard with the maple syrup or it may deflate your aquafaba.
Start with adding 3/4 of your coconut to the aquafaba and fold/stir to combine. If it looks too wet, add more coconut flakes a little at a time until you get a very moist “dough”. It will look like it is too wet but don't add more coconut! If the dough is too wet, they won't rise in the oven. If it's too dry, they will be crumbly. So be sure to add a little at a time until the proper texture is achieved. If you add all of the coconut and it still appears too wet, it's fine to add a little untoasted coconut!
Measure out heaping 1 tbsp. amounts and scoop onto a parchment-lined baking sheet. Bake at 325 degrees F for 25 minutes. Then increase heat to 350 degrees F and bake for 8-10 min more or until golden brown and semi-firm to the touch.
Let cool. Then enjoy. For a chocolate coating (optional), melt vegan dark chocolate in the microwave in 30 second increments until smooth and creamy. Then dip the macaroons into the chocolate and place on a parchment- or wax paper-lined baking sheet or serving platter. Drizzle the tops with remaining chocolate and set in the refrigerator (or freezer) to cool until the chocolate is firm to the touch.
Store leftover macaroons covered and at room temperature up to 3 days, in the refrigerator up to 5 days, or in the freezer up to 1 month. They are crispy the first day and then tend to soften, which is normal. They are still delicious though! Just best when fresh