And I'm not talking about supernovae! This program locked my Mac up solid. First try, I booted it and saw the slick welcome of the Sun and then swing over to the Earth. Then, I activated the demo. It started on the rotation of the Earth, then hung somewhere in orbit. MY ENTIRE MAC GOT LOCKED. I could move the mouse and that was all. No Force Quit, no nothing. Had to hit the hard reset button. On my second attempt after my reboot, it didn't even get past the Sun. RED ALERT SCOTTIE!