The purpose of my outlining the simple path I took was to point out that it is there for those who use Time Machine if they will make a full copy of their current OS before installing a newer OS. It enabled me to recover from my mistake. Things are now back to normal with 10.8.5. I'm likely to stay there for a substantial amount of time.

I'm aware of the alternative methods and apps, but chose to go with Time Machine after having some problems with SuperDuper using my hardware configuration.

Thanks to Artie505 for catching my error. I had very little sleep and have no business "driving" my computer in this condition.

Last edited by JoBoy; 11/03/13 07:52 PM. Reason: wrote iTunes instead of Time Machine

Mac Pro dual Quad-Core Intel Xeons Early 2008; 16GB RAM; MacOS X 10.11.6, iOS 9.3.5