Why is minecraft not reading my texture pack?

Ok so yesturday i started messing with terrain files and guy and stuff and a bunch of minecraft stuff to make me and my friend a nice looking texture pack. So vie looked at tutorials and stuff i have all the right files. And no i did not rename anything. Im using mac. The texture pack works if i put it all in the same folder as the minecraft app itself so it uses those as the source. But when i put it zipped in the library/applicationsupport/minecraft/tex… or whatever i go to the game it shows up but doesn't use the textures... just goes default on me...?