[header] How to restore a macbook pro [title] Back up any files you want saved to an external hard drive or online cloud storage system. [step] Restoring your macbook pro will wipe and erase all the data from your computer's hard drive. [title] Power off your macbook and connect it to a power source. 
[step] This will prevent your computer from shutting down and interfering with the restoration process. [title] Power on your macbook pro and wait for the apple startup sound.