I bought second hand Apple MacBook Air and the time I was configuring the settings, the system lock. Of course I don't know the pin, I don't know the password, I don't know the ID. The only thing I know is the name of the administrator and I thing- the server. I have never before Mac and I didn't know the security system they have, to be more careful. Now I am trying to find a way to set back the system. I try the buttons ( command-R-P) - nothing happen. I have Kali in VM ,but I am knew in all these things and I need a time to understand everything well. That's why I am asking for help, please.