Pop the popcorn. I use this air popper, but you can use whatever method you like.
In a roasting pan or cookie sheet with sides, place the coconut oil, chocolate, maple syrup, salt, and cinnamon. Place the pan in the oven while it preheats and once everything is melted, stir to combine well.
Add the popcorn to the chocolate mixture and stir to coat evenly. Bake for 6 minutes, stirring every two minutes.