I accidentally deleted my admin account from directory utilities system. Now I'm using my standard account to login, in the system preferences there is no admin account but when I click the lock it requires admin name and password. I did some research and found out that activating Setup Assistant allow me to create my new admin account. I tried many ways but it ended up automatically log in to my current standard account every time I "reboot" my Mac.
When I enter
mount -uw / it shows: "volume couldn't be mounted" and "failed with 77"
rm /var/db.AppleSetupDone echoes: "Override root...AppleSetupDone?" and "no such file or directory"
Please help me fix this