Minecraft Forums

I've been playing for a long time(on a mac), but my Minecraft 1.4.7 would not update. So i followed some people on the internet, so i could update it. Everything went smoothly until my Minecraft went to the screen that says Mojang and had its sign and it stops and stays on the screen not going on he home screen that gives me the buttons to play single or multiplayer, or to choose texture packs. Please help me with this problem and yes i have already tried deleting and redownloading it. Please answer this as quickly as possible!