Even better with SSD and FileVault 2
Disk Utility has three main sections: a toolbar that spans the top of the Disk Utility workspace; a vertical pane on the left that displays disks and volumes; and a work area on the right, where you can perform tasks on a selected disk or volume. Launch it. Erasing a volume is an easy way to free up drive space. Many multimedia applications, such as Adobe Photoshop, need a large amount of contiguous disk space to work. Erasing a volume is a faster way of creating that space than using third-party defragmenting tools.
Because this process erases all the data on a volume, many multimedia-savvy individuals create small volumes to hold a project's worth of data and then erase the volume before starting the next project.
The data-erase method outlined here doesn't address any security issues that may be associated with the erased data. In fact, most data recovery programs would be able to resurrect the data that was erased using this simple process. If you're concerned about security, consider using the secure erase procedure addressed later in this guide. If you need to change the format type, see how to format a Mac's hard drive using Disk Utility later in this guide. Disk Utility provides four options for securely erasing the data on a volume.
Macintosh whole disk erase: Using Disk Utility
Department of Defense requirements for erasing confidential data from hard drives. If you're concerned about someone being able to recover the data you're about to erase, use this secure erase method. The slider options are:. Formatting a drive is conceptually the same as erasing it. The main difference is that you will select a drive, not a volume, from the list of devices.
You will also select the type of drive format to use. Disk Utility can't directly erase or format a startup disk, because Disk Utility and all of the system functions it uses are located on that disk.
If Disk Utility tried to erase the startup disk, it would at some point erase itself, which could present a problem. To get around this, use Disk Utility from a source other than the startup disk. Macs without optical drives use the Recovery volume. Share Pin Email. Tom Nelson has written hundreds of articles, tutorials, and reviews for Other World Computing and About. He is the president of Coyote Moon, Inc. Select a volume from the disks and volumes listed at the left side of the Disk Utility window. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in.
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How to Secure Empty Trash and Erase Free Space from an Old Mac
Click here to Register a free account now! Is 7 pass erase secure enough? Started by bovril , Nov 21 AM. Please log in to reply. Posted 21 November - PM It depends what you mean by required?
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Posted 21 November - PM bludshot is right. As many as possible please! Posted 22 November - PM Seven pass is what the military uses, and only on mechanical hard drives. Are you going to dispose of it by throwing it out? Smash it with a hammer a few times. Are you keeping it and just want to delete everything? Just format it.
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Posted 22 November - PM No I am not going to destroy it but keeping any data is not an option. Posted 23 November - AM What is the point of more answers? Top 5 things that never get done: 1. Posted 24 November - AM What is the point of more answers? Posted 24 November - AM If you are worried, use the 7 layer wipe.
Mac How to erase your Mac's hard drive the right way | Macworld
Edited by zingo, 24 November - AM. If I am helping you with a problem and I have not responded within 48 hours please send me a PM. Posted 24 November - PM Well the thing is not all answers are the same.
Seriously, do what will make you feel comfortable about it. Back to Internal Hardware. Site Changelog. Leaving all these discussions, if you just want to securely erase free space on your SSD then here are two different ways you can try. But, if you are set on it then, give a second thought to your mind and proceed. Step 1: Open Applications folder and switch to Utilities folder. Step 6: Wait till your drive gets erased and encrypted. It takes time, depending on type, size, and speed of the drive.