Help me, please I went into system preferences, clicked on the current user (advanced options), which was named 'user', which was also the administrator, and changed the name to 'grant'. I then tried to create another administrator user called 'grant'. When I logged back in the only user available to log in with was 'user'. When I opened user preferences I see that 'user' is no longer an administrator. I've tried every combination of 'user' and 'grant' and nothing works. I've tried the code (after restarting and press cmd +S ) mount -uw / nm /var/db/.AppleSetupDone But it shows me [ Erreur no developer tools were found at'application/Xcode.app' and no install could be required perhaps no UI is present please install manually from developer.apple.com ] I can't download Xcode cause I don't have an admin account. (MacBook pro 2015 high sierra)