Aviso: Estás editando un prerrequisito para la guía que estabas viendo. Cualquier cambio que realices afectará la guía que incluye este paso.
Traduciendo paso 3
Carefully lift the power supply out of the outer case and rotate it to expose the cable lock as shown, minding the DC-Out and AC-In cables still attaching it to the iMac.
Disconnect the DC-Out cable by depressing the locking mechanism on the connector while you pull the connector away from its socket on the power supply.
Once the locking mechanism has cleared the socket, pull the DC-In connector away from the power supply.