Changing in game voices to Korean on a Mac.

Hi, I've successfully changed the voices in champion select to Korean, but I've been trying to figure out how to change my "Locale.cfg" file to Korean also. When I change the file to "locale = ko_KR" instead of patching successfully to korean I am left with a "LeagueOfLegends_KR_Installer.exe" file. ".exe" files are not compatible for mac. Is there a reason it is automatically pulling an .exe file and not a mac equivalent? Is there a way I can get it to update with the appropriate file?

Thank you.