Hi Jon: Yes, I am sure you just made that up. Brilliant!
Anyway, you won't believe this, but I contacted Canon and they suggested I run disk permissions. I did that from the regular old disk utility on my Mac, and voila! It is now working. Couldn't believe it. I do thank you for your input, though. It's always valuable. Thanks again.
Rita
Grelber is right. "The only thing we have to fear is fear itself." (I just made that up.)