Resetear o cambiar la contraseña de administrador de Mac sin disco

Ayer tuvimos que cambiar la contraseña de administrador de un Mac (Maverik) porque el usuario no se acordaba y necesitaba instalar programas. Obviamente no teníamos discos. Os digo como lo hicimos.
Nota: siempre asegúrate de tener copia de seguridad de tus archivos antes de hacer estas modificaciones.

 Recovery Mode. Mac es un UNIX, y tiene el recovery mode (aunque en los Linux ahora está algo más oculto precisamente por esto).

Para arrancar en Recovery Mode enciende el ordenador con las teclas CMD+R apretadas (cuando suene la campanita tienen que estar pulsadas). Entrará en un modo que te pedirá el idioma y te dará varias opciones.
Arriba en el menú busca una opción que te permite abrir un terminal (en Utilidades) y desde el terminal teclea:

resetpassword

Y pulsa Intro. Verás que se abre una herramienta que te pide elegir el disco (elige donde tienes el Mac OS), y el usuario al que quieres cambiar la contraseña (por ejemplo al root). Cámbiala, reinicia y ya lo tienes.
Esta es la que usamos nosotros y en menos de 5 minutos lo teníamos todo arreglado.

 

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