Yes, I think I have tried every way possible. So far I have tried dragging to the application folder and replacing the file, opening from the download file, stopping safari from automatically opening the file and dragging the raw zip file to the applications folder, dragging the file to the desktop, and starting from scratch then downloading the update zip. So far nothing works.
Could it be a "lion" thing? I can run a pc with my eyes closed but the Mac is like re-learning, so some of what I'm doing is new to me and I apologize. WD is running very well in VB on this machine but eventually I'd like to at least try WD for Mac. Thanks for the help so far!