league will not open (MacOS) please help

whenever i try and open league of legends on mac i get this "You can’t open the application “League of Legends” because it is not responding." i have followed guides that always build up to opening the folder called "MacOS" but the thing is i never have that folder.i have deleted and re downloaded it multiple times and every time i get no folder with that name(yes i did download mac version).i have no idea what is going on beacuse this happened overnight.please help.