Hello toblar,
the Demo #1 was created on a G5, Dual 2.7 Ghz - it should be absolutely no problem to play it on a MacPro....
Do you get any kind of crash reports? Please send these to our support team, with as much information as possible.
Concerning your first project: please include this project as well.
What worries me is that your MacPro crashes when trying to unzip a file.....
In any case, try to "Repair Permissions" every now and then (with the app "DiskUtitlity").
Best,
Paul
Paul Kopf Product Manager VSL