wipe out ssd in a MacBook Air

[giobaxx27]

Hello to everyone

I'm not a Mac user, but i my supervisor asked to wipe out a ssd of macbook. Basically we need to send the Mac to repaired but for security reason we need to wipe out, and then when the Mac will be back we'll need to reinstall.

I googled a lot searching clarifications about the necessity to erase an SDD. I read that for how it works an SSD i don't need to wipe a disk in the old way but i can simply erase all.

But how to do it?? i thought

1) to reboot this macbook in recovery mode and use the diskutil utility to delete all. In DiskUtil i don't have the "Security Option" because oft this :

"Note: With an SSD drive, Secure Erase and Erasing Free Space are not available in Disk Utility. These options are not needed for an SSD drive because a standard erase makes it difficult to recover data from an SSD. For more security, consider turning on FileVault encryption when you start using your SSD drive."

Correct? So the button erase is enough?

or

2) Start with a Bootable Ubuntu Live Usb and run this command: for i in $( seq 0 2 ); do dd if=/dev/urandom of=/dev/sda; done

or there is some software possibly freeware that works with ssd??

Tanks for any advice.....

 

[Mr_Brightside_@]

Follow this: https://support.apple.com/en-ca/HT201314
Starting with this: https://support.apple.com/kb/PH22241?locale=en_US

It would be best to reinstall a fresh copy of macOS after erasing, as the repair company may need it installed.

 

[hobowankenobi]

Per the above links, boot to recovery mode. This is required to erase the boot drive....boot to something else.

FYI, lots of ways to do this, but most require other machines, bootable clones, thunderbolt cables, etc. Recovery mode requires nothing but holding the keys command + R at boot.

Once in recovery mode, follow the second list. The goal is to open Disk Utility, select the internal SSD and erase it. Here is a write up with some screen shots. Be aware that Disk Utility got a make over and looks different, but the functionality is essentially the same. More recent version and functions here.


And yes, with an SSD, very little risk of data recovery once erased.