How to wipe Mac OS X El Capitan hard drive?


#1

Can disk utility wipe entire Mac hard drive securely? I am running OS X El Capitan 10.11.5.


#2

How many partitions your HDD is divided? Do you want to erase the partition associated with the El Capitan or the entire HDD?


#3

Hi hornbillhatch,

Yes, it can though Mac OS X Utilities. But first I will recommend you take a full backup of the Mac hard drive, SSD or partitions since wiping permanently erases the data beyond the scope of recovery.

  1. Restart Mac OS X and press-hold Command + R before Apple Logo screen. In a short time, you will be welcomed to the “MacOSX Utilities”.

  2. Click Disk Utility. Select your Apple Hard Drive

  3. Click Erase << Security Options << Select range of disk wiping

  4. Click OK << Apply to secure wipe your Mac hard drive.

Alternatively, you can use a third party Mac wipe application to create a bootable media with which you can secure wipe startup disk or any other local volume. But as I mentioned above, before you start wiping any hard drive, you must create at least one backup copy. Other than Time Machine, get a bootable clone of your hard drive.