When League Closes Client And The Game Finishes, Im Stuck At 1024 x 576!

I put on ''Close Client During Game'', and when the game finishes, I'm always at 1024 x 576 even though mine is set at 1280 x 720. Sometimes I might be able to change it back, but most of the time only 1024 x 576 is available. Can you please fix this? I'm using a Mac so I don't know if anyone else is experiencing this. But please, this is really annoying. Thank you