Yes Cinnamon does help keep mice way since Cinnamon puts out a strong aroma that mice hate and will avoid.
So you can keep mice away from areas by placing some cinnamon into a bottle cap or in a small bowl near the area where you want to keep mice away.
Or you can use some cloth and make some little bags with cinnamon in the cloth bags and then place those homemade cinnamon bags around the areas where mice are hanging out.
You can also use some cotton balls and soak them with some cinnamon oil and place the cinnamon oil soaked cotton balls around places where mice are hanging around and they will stay away.