MacOS – Have 2 iCloud accounts in the mac and don’t know how

You can create a new administrator account by restarting the Setup Assistant:

1. Boot into Single User Mode: Start/restart your Mac. As soon as you hear the startup tone, press and hold ⌘ + S until you see a black screen with white lettering. (If you end up back on the login screen after a flash of the black screen with white lettering, enter your password and it will return to the black screen.)

2. Check and repair the drive by typing /sbin/fsck -fy then ↩ enter - as directed by the on-screen text.

3. Mount the drive as read-write by typing /sbin/mount -uw / then ↩ enter.

4. Remove the Apple Setup Done file by typing rm /var/db/.AppleSetupDone then ↩ enter.

5. Reboot by typing reboot then ↩ enter.

6. Complete the setup process, creating a new admin account.

Note that this may result in the new account being logging in automatically when the system is restarted, replacing whatever account may have been set to automatically log in previously. If you need to retain access to the original account without knowing its password, this may mess that up.

Apple's Mail app stores the settings for SMTP servers apart from the settings for IMAP/POP3 servers. In my experience, this often leads to the fact that after deleting mail accounts, the SMTP servers are still visible in the connection doctor although all other data regarding a certain internet/email account have been removed.

In case the connection doctor shows you only the SMTP accounts of the already deleted mail accounts, please proceed as follows:

• Open Mail > Settings > Accounts > SMTP-Server > Edit SMTP-Server list
• In the dialog which opens: Select entries in the server list
• Remove items by clicking on the minus-symbol below the list

In case the connection doctor also shows you the IMAP or POP3 account information of the already deleted mail accounts, proceed as follows:

• Quit Mail
• Re-add the accounts using System Preferences > Internet Accounts
• Open Mail
• Quit Mail
• Remove the accounts using System Preferences > Internet Accounts