Google Earth for Mac
Overall, it looks and feels like an X11 application. That, combined with a overly busy user interface that does not focus on the core display (which is quite fantastic in and of itself) leads to an application that is just terribly unpleasant to use.
Well, I beg to differ. My daughter and I had a lot of fun with Google Earth the other evening, it was a snap to download and install, and very pleasing to use. Could it be even more pleasing? Well yes, certainly it could, and it will, but as for now it's a great tool. The perfect one. The only one that exists. And it's easy enough for an 8-year-old child to use.