Mojave install hanging
I'm trying to install Mojave on my MacBook Pro Retina. The install starts, and continues for a while, and then hangs indefinitely with "about 15 minutes remaining". If I shutdown and restart, it brings up a Mojave window, but then nothing works: pretty much anything I try results in a persistent beachball, and it won't respond to anything (trackpad, keypad, force-quit shortcut, etc.). I tried shutting down and then reinstalling from my most recent High Sierra Time Machine backup -- that went through, although it deleted all items from the desktop, and Time Machine now shows Desktop greyed out for all previous backups (I can live with that, but it's weird). Trying the Mojave install again from that state just gets me the same result: partial install, hanging at "About 15 minutes remaining".
Help!
--
Steve Anderson