how to install Too many items in minecraft 1.3.2 (mac)

mine craft download http://www.minecraft.net/download the unarchiver is in the app store just search and you will find it too many items 1.3.2 download: http://www.minecraftforum.net/topic/140684-13212w34a-toomanyitems-in-game-invedit-aug-23/