Reset iCloud keychain
I have an issue with iCloud data sync on my Mac. When start Resume Data Sync, I'm asked to enter Mac password. The next step is I'm asked to enter the password I previously used to unlock this Mac.
The case is that due to policy, I have to change passwords frequently, and when I tried all my old password for this Mac, none of them was accepted. Don't know any passwords option doesn't lead to any other useful direction except Cancel and Try again later.
So my idea is either simply to reset iCloud keychain or even reset my iCloud linked to a particular email. I don't need any data there. I just need to set it up from scratch.
Are there any options to reset iCloud or iCloud Keychain only for particular account? Data stored there can be lost.