Can't login to iMac and Apple ID recovery not working
Hey,
So I came home after a month on vacation, plugged my iMac in (macOS 10.12.6) and it won't accept my password. I have tried every password I have ever used and nothing works. After three attempts the "recover using Apple ID credentials" pops up but that's not working either (I logged in and out of my apple ID a few times on another device so I know there is nothing wrong with that password)... I have used that recovery method once before with no issues (not too terribly long ago).
I have tried going into recovery mode and re installing OSX, no luck, same problem... My main question is, is it necessary to be on line when trying to recover from my Apple ID? I have searched and searched but can't find it specified anywhere. Odly enough, when I am in recovery mode, I can can turn on my wifi and go to on line help (but there are no options there for recovery from Apple ID while in recovery mode), but when I'm on the login screen my wifi is inactive so have no way of getting online if it is necessary. If that is not the problem then why won't it accept my Apple ID which works fine everywhere else?
I do not have a Time Machine back up but have most of my stuff backed up to either the cloud or manually on other disk... but regardless I'd prefer not to have to do a clean install.
Any help is appreciated.
iMac, null