I have searched the threads for an answer, but found none for my issue. I downloaded the new Google Earth app to our new iMac (20", 2.4Gz, 2Gb). It started up fine and looked OK at first. As I zoomed in, the images began to fragment and scramble. The closer I go, the worse it gets. I tried adjusting settings and preferences in both the app and on the iMac. Nothing seemed to work. Any ideas? Oh, it was the latest version, 4.2 something, with the sky images. Thanks for any replies.