It's been stuck like that for half an hour, so I restarted my mac. I opened it again, it still freezes there. I even uninstalled and reinstalled it. Still the same problem. Can anybody help me out?

I think what froze it was when I installed Single Player Commands. I got rid of it...but still the same problem. I'm not 100% sure on how to uninstall it from MineCraft...but I reinstalled mc all together...Still the same problem.

If you don't have another mods installed...

Get to your mine craft.jar and copy file and paste under the main file.(name mine craft copy.jar)

Open your main mine craft.jar

Copy your level .dat

Than delete ALL FILE IN SIDE.

Open mine craft (should be unfrozen)

Then close

Go to mine craft .jar

Delete level.dat and replace with the one you copied.

This should work. But this is for windows, not sure if it is the same on mac.

If something goes wrong then delete the broken .jar and rename the mine craft copy.jar

To mine craft.jar

This should reset to frozen version

I am pretty sure about all of this but I could be wrong so don't sue me if I brake your mac or something

I can't find minecraft.jar.

Search %app data%

Should come up.

Bear in mind I am working on windows so it might not be the same

I made a little comic to help you out, it is for your interpretation.

Yep, that really helped