Are you seeing a "General Installation Error" at about 50%?
Correct Mike M!!!
MIke M (a different kind of Magic Mike) you are the best!
It took me another 5 hours, and I have no idea what mach_kernel was/is, but clearly I had disposed of it. After following your steps to a "t,"including adding "secrets," using time machine, etc. Well, because of your expertise, I was able to install Flash player.
You saved my professional life and my eyes, as the burning chopsticks have been blown out...
In all sincerity, I promise to "pay it forward" in your honor, CR