Thanks for helping OrgonGov!
Jim, you might try disabling “create scene thumbnails”. If your model has sevaral floors, we’ve noticed SU will struggle a bit and sometimes crash when creating scenes.
Also, try adjusting the style that you want before you create your perspectives (just update the “Presentation Style”). Macs are notorious for being under-powered when it comes to heavy graphics processing. You could also make sure your shadows are turned off in the style you’re trying to create before you make the scene. To be safe, I would ensure that all other programs are closed, and you only have SketchUp open.
Give this a try.
Good suggestion about trying the DESIGN style.. correct, it’s not as heavy and may get you the scenes first without crashing that you can customize later.