High Sierra Freezes on Login
I upgraded to High Sierra (iMac 27″ late 2013). I worked without problems for 5 days. Then the disaster: progress bar that gets to ~75% progress slowly (very very slowly) and then freezes.

I tried:


restart in safety Mode
reset PRAM
check HD with Disk Utility (no problems detected)
restart in recovery Mode and reinstall High Sierra from partition


but there was the same problem (progress bar that gets to ~75% progress and then freezes)

Yesterday I boot my iMac from an external HD (with Sierra OS) and now I'm working with this (I reinstalled only Adobe Suite).

I think that the solution is reinstall Sierra.