The easiest and official way to factory reset your mac computer or your MacBook Pro to it's factory settings.
By the way, if you read the description, I need to point some staff out. If you reset your mac, then automatically the newest version of Mac OS X will be installed to your computer. Next, make sure that you know your Apple ID because you will be asked for it and if you don't know it, then you may need to click on forgot password, so Apple will send you instructions to reset your password and change it.
Everything else is explained on the video. Hope you find it helpful.
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