You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

User profile for user: uboboss
uboboss Author
User level: Level 1
8 points

initialize hard disk mac pro

Hi everyone, before sending to apple my macbook pro for a battery replacement, I want to delete all files in it. ( I already have time machine backup on external hard disk )

So I open the laptop in recovery mode, utility disk, and clicked " initialize" macHD.

The question is: I saw 2 different macHD in recovery mode , one smaller ( 20gb) and one bigger (100gb). I initialized the smaller one, and then the screen turned all black showing a "?" .

I want to know if I deleted all files in it or only the OS ( but all data are still in the HD).

Any opinion about this? is there a way to know if mac is empty or not?!

thanks in advance


Andy


Posted on Feb 22, 2021 12:16 PM

Reply
Question marked as Top-ranking reply
User profile for user: Grant Bennet-Alder
Grant Bennet-Alder
User level: Level 10
133,045 points

Posted on Feb 23, 2021 8:46 AM

this article has the approved procedure, provided you do NOT have a firmware password installed


How to reinstall macOS - Apple Support


if you Mac has a T2 chip, there is more to the process:


About Startup Security Utility - Apple Support



View in context

Similar questions

3 replies

initialize hard disk mac pro

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.
Learn more Sign up