I have a MacBook 2GHz Intel Core 2 Duo and last weekend I updated my iOS to 10.6.8. After this update I tried to start Greenfoot but it won't open. When you click on the icon in the map programms, the square opens with the Greenfoot title and after that everything just dissapears. When you start Greenfoot again, the same thing happens.
Can anybody help me with this problem?
Thank you.

