Hi,
I bought the unity 2.5 for mac yesterday 
very cool !!!
But trying something I destroyed the demo island :-((
The assets loads but the scene seems to be empty :-((
There is a way to download the demo island and to re-install it to continue try and learn to use this beautiful product ???
Thank you.
it does not work.
I tried to re-install everithing but the scene is always blank and if I press the play button I see only a blue rectangle.
Assets are loaded but something with the scene occurred :-((
You have the Project opened, but you have to actually open the Scene file… In the Project Pane it’s the little Unity icon with the name “Islands”.