It may take several hours or more to complete this process. It writes random data over the disk seven times. 7-Pass Erase: This is considered sufficient to erase data from a disk.
Zero Out Data: There are utilities that, albeit expensive and time consuming, can retrieve zeroed-out data. Files can be recovered by disk utilities, and other advanced recovery software. Don't Erase Data: This option only rewrites the headers on the disk. The following are the available security options: 
Select the drive you need to format under the left hand menu you need to select the actual drive rather than the partition. You will need to boot from an OS installation disk and then launch Disk Utility from the Utilities menu. After backing up please ensure that all removable storage media (floppy disks, CD, DVD, Jazz, Zip) have been removed.įor Mac OS 10.3 and above (earlier versions, see below), secure data removal can be done natively with the operating system using the Disk Utility. You can write the data to a CD, USB stick or other storage device. Warning: Please ensure all of the data from the computer is backed up since there will be no way to recover your data after you have finished this procedure.
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