Same problem here...I tried running the updater under safe boot and got a new message at the same point in the process which said the program could not connect to the internet...perhaps that is where the glitch resides...?
I have the same problem. Updater gets to "0" items to install ("Finishing") and hangs. Force quitting the file extractor makes the updater quit by itself, but the version number is not updated. I was upgrading a v12 file on a new macbook pro that was migrated; when it didn't work I uninstalled and reinstalled v12 from CD - same result with the updater. Virus protection off. Any ideas?