That error (U44M1P7) usually indicates that a required file has been deleted or modified by another program or the user. The solution is to run the CS6 installer again to repair/replace the missing/modified file, then run the updater.
That should do it for ya.
Let us know how it goes for you
Thanks Pete that seems to have worked. It was a bit odd but I think that was a result of the fact that I used to have all my Apps organized into subfolders in my App folder. That worked fine until the last few years when more and more Apps would only work if stored directly in the Apps folder so I moved everything out of the subfolders. When I tried to reinstall Photoshop as per your instructions the installer wanted to install it in the deleted folder and I could see no way to change it. I did the install anyway and the installer created the old folder and installed some stuff in it. The Photoshop app was not functional so I deleted all that was installed. During the install process I had been asked to quit a program I have installed called "FlashFrozen". I had noticed that part of the update had to do with flash so I tried the update again on the existing copy of Photoshop with FlashFrozen not running and it worked fine.
…that was a result of the fact that I used to have all my Apps organized into subfolders in my App folder…
That is a monumentally bad idea. It is guaranteed to give you grief sooner or later.
Never change the default install location of an Adobe application, never move it, never change the name of any volume or folder in its path, and never, ever create sub-folders in which to hide them in a misguided attempt to "organize" things.
If you want to organize, use aliases somewhere else. Also, that's what the Dock is there for on a Mac.