MINECRAFT FULL SCREEN DOESN' T WORK ON MAC OSX 10.6.4

What I expected to happen was...:
Describe what you thought should happen here

• When you click on the "full screen" button the screen of Minecraft 1.7 becomes bigger

What actually happened was...:
Describe what happened here

• When you click on the "full screen" button, the screen of Minecraft becomes totally dark, but you can hear the "sound" of the icons when you click on them

Steps to Reproduce:
1. Run Minecraft 1.7 on Mac OsX Snow Leopard 10.6.4
2. In the main menu, click on "options" and then on "full screen"
3. The screen becomes dark (this problem is only on the 1.6 and 1.7 versions).

I'm really worried. Please solve this bug.
Your Minecrafter,
Nogarin95