I was following this article, What to do before selling or giving away your Mac - Apple Support to format my hard drive. I backed everything up and it's been transferred to my new computer and I followed the steps in Disk Utility in the article. When I went to reinstall OS X, it had me put in my Apple ID and password and is still connected to my home Wifi. That won't be saved will it? Will I be ok to sell it once OS X is installed (but not setup)? Thank you for your assistance.