After migration of a user to another Mac (Catalina to Big Sur, Intel to Apple Silicon) via Time Machine backup, user is stuck on login screen
Login with the original admin account.
Delete the migrated user (say, &quot;Joe User&quot;) with the Users &amp; Groups control panel. Choose the option to keep the user folder as it is. It will get renamed from joeuser to joeuser (deleted).
Go to the Users folder on your hard disk and re-rename joeuser (deleted) again to joeuser.
Add &quot;Joe User&quot; again with Users &amp; Groups control panel. Make sure it gets the same user folder name (joeuser) and select the option to use the existing folder when you create it.