I just downloaded the .zip file with the contents of the blender 2.63 test build for mac os x and it won't open on my computer. The little icon just bounces in the dock for a few seconds and then I get a dialog saying blender unexpectedly quit. I am new to blender, so any help would be appreciated. Do I maybe just need to delete the old blender? I am also new to mac, so hopefully one of you can understand my frustration. I am finally getting pretty good at Blender, and was extremely excited about testing the new builds, but I am apparently doing something wrong. PLEASE HELP!