I Need Some Help With Installing Maps on Star Wars Battlefront

I took out an old game I had not played in a few years that I have for Mac, Star Wars Battlefront. And just for fun, I took a look around to see if I could get new maps. I found some, and tried installing them onto the game, I put them into the AddOn folder, but nothing seems to work when I check them out in the game.

I'm not sure anyone would be able to help me, but if you could, that would be great.