"Create a fresh install and manually (!) copy individual files from time machine to your mac.“" This is, and always has been, the only sane answer. If you val

"Create a fresh install and manually (!) copy individual files from time machine to your mac.“" This is, and always has been, the only sane answer. If you value your time, energy and sanity you do not upgrade your OS - you wipe it clean and install from scratch. It is as true today with OSX as it was going from Windows 3.1 to Windows 95.