How To Permanently Delete Files From Mac Hard Drive

  1. Mac Deleted File Recovery
  2. How To Permanently Delete Files From Mac Hard Drive Recovery
  3. How To Permanently Delete Files From Mac Hard Drive Using

Dec 02, 2021 How to erase files using BitRaser File Eraser? BitRaser File Eraser can erase files/folders from your Mac hard drive. The erasure will delete all the files in the selected files/folder. You also get the option to select multiple files/folders at the time of erasure. Please follow the below steps to erase files in your Mac using BitRaser File.

  1. To delete an item, select the file, then click Delete.Also know, how do I permanently delete files from my Mac hard drive? Choose Apple menu About This Mac, click Storage, then click Manage.Click a category in the sidebar: Applications, Music, TV, Messages, and Books: These categories list files individually.
  2. Delete your Web browsing history inside the browser control panel. From Internet Explorer, click on the 'Tools' button and select 'Internet Options.' Under the 'General' tab in the 'Browsing History' section, click on the 'Delete' button. Click the check box next to each type of data you want to erase, and, if you want, leave the check.

Sep 30, 2021 Move everything that are important to you to an external hard drive. It is time-consuming but feasible if you have limited documents, photos, videos, etc. That need to be backed up before erasing Mac. Back up your files on Mac to a cloud storage, such as iCloud. Before doing that, make sure your iCloud account has enough free space.

What if something happened to your Mac and you didn’t have a backup?

What if something happened to an important document on your Mac? Say you messed up one of your documents and needed to get it back.

That’s when having a copy of your files on an external hard drive comes in.

When you’re considering using a Seagate on your Mac … you want to know.

How do you use a Seagate external hard drive on your Mac?

How To Permanently Delete Files From Mac Hard Drive

You can read on and find out.

What Are The Ways To Use Your Seagate External Hard Drive On Your Mac

1. You cancopy your documents, photos, movies. Anything you want onto one of Seagate’sexternal hard drives. Freeing up space on your Mac.

2. Use yourSeagate and share your documents between your Mac and a Windows PC.

3. Use TimeMachine and back up your Mac’s files to your Seagate. Keeping your files safe.

1. How Do I Make My Seagate Work With A Mac?

One thing you should know first. SeagateTechnologies sell external hard drives that are formatted in different ways.

How does that matter?

You’ll find different formats. Also knownas file systems. And these file systems or formats tell you how the drive islaid out.

How your Seagate external hard drive isformatted opens up. Or restricts what you can do with it on your Mac.

I’ll show you some examples.

Seagates With An ExFAT File System

You can plug into your Mac your Seagate ExFAT external hard drive. And your Mac will see the drive. You’ll be able to copy and paste your files to that Seagate drive. Or drag and drop what ever you need to your Seagate drive.

The other advantage of an ExFAT Seagateformatted external hard drive? Is a Windows PC understands ExFAT as well.

This makes ExFAT a great file system tohave. Especially, when you want to share your Seagate drive between your Macand a Windows PC.

But the downside of ExFAT is that you can’t use your Seagate drive for a Time Machine backup. Not without reformatting first.

Seagate With A NTFS File System

When you plug in your Seagate NTFS formatted external hard drive into your Mac. Your Mac can see any documents or files already on the drive.

But youwon’t be able to change any of the documents or files on there.

You can only copy them off to work on them on your Mac. This is because NTFS is a Windows file system.

You also won’t be able to use an NTFS Seagate drive for your Time Machine backup. You’ll need to reformat first.

You can read more about the Seagate Backup Plus Slim here.

2. How To Use Your Seagate Hard Drive And Put On A Mac File System

Apple made two file systems for Macs.

Mac OS Extended (Journaled) – this file system is also known as HFS+. This is your typical Mac file system.

When you’replanning to use your Seagate drive only for your Mac. There are a few reasonsto reformat your drive this way.

Reason 1, your Mac can use a Seagate external hard drive formatted as HFS+ for a Time Machine backup.

So ifanything happens to your Mac you can restore your entire Mac from a TimeMachine backup.

Reason 2, when you accidentally delete a file you want, then you can bring that file back as well.

Only a Maccan read a HFS+ file system.

You can split up a large enough HFS+ Seagate drive. You call this partitioning. And it means you can have one section say for your Time Machine backups. And another section to copy and paste files to.

You could even have a third section set up as ExFAT to share with a Windows PC.

APFS (Apple File System) is other type of Mac file system.

You use this file system for Solid State drives. It’s a faster Mac file system suited to those drives. And you could reformat your Seagate Solid State Drive to APFS.

Onlyanother Mac can read APFS. But you can’t do a Time Machine backup to an APFSformatted drive.

You can find out how to format your Seagate external hard drive in a document here.

3. How Do You Know Which File System You Have On Your Seagate Drive?

When youplug in your Seagate external hard drive into your Mac you’ll see a drive icon onyour Mac’s desktop.

Right clickon your Seagate’s drive icon.

Pick ‘GetInfo’ from the menu.

Then lookdown the list you’re shown till you get to Format.

If you see NTFS or ExFAT then you’ll know which kind of drive you have. And then depending what you plan to use your Seagate drive for you can decide.

Mac Deleted File Recovery

4. Don’t Want To Reformat Your Seagate NTFS External Drive?

And you maynot want to.

Becauseyou’re using your Seagate NTFS external hard drive mostly for a Windows PC. Andonly sometimes on your Mac.

But youwant to do more than just to copy the files off the drive and use them on yourMac. You want to put files back on the drive. Or updated the files on theSeagate drive.

There isanother option.

Seagatethemselves sell some of their drives with driver software.

What isdriver software?

This issoftware you can download and run on your Mac. This software allows your Mac tochange files on the Seagate NTFS external hard drive.

And as longas you have the software loaded. And you keep the software updated to matchyour Mac’s operating system you’ll be fine. And it may be a better option foryou rather than reformatting.

You can learn more about using a Seagate NTFS drive without reformatting in my article here.

5. Plugging In Your Seagate External Hard Drive Into Your MacBook Pro?

Or yourMacBook Air or iMac.

Do you have a 2017 MacBook Pro or iMac? MacBook Air 2018? Then you’ll have a Mac with USB C ports on it.

And?

Many of theSeagate external hard drives are USB 3.0 drives.

So what?

They willwork. But you’ll need to get yourself an USB micro B to USB C adaptor cablewhen you buy your Seagate drive. Or a USB A to USB C adaptor.

The SeagateUltra Touch for example comes with a type A to USB C adaptor in the box.

The Thunderbolt LaCie Seagate external drives come with the right cable for your Mac.

But what ifmy Mac is older then that?

If your Machas USB 3.1 ports you’ll also need an adaptor cable.

If your Macis earlier than 2011. Then it’s likely to have a type A USB port and you canplug your USB 3.0 Seagate drive right into it.

The driveis able to work faster than your older Mac. But there’s backwards compatibilityof the USB standards. And this mean your Mac will talk to your Seagate drivejust fine. At USB 3.0 or 2.0 speed.

You can find out more information in an article here.

6. How To Use Your Seagate External Hard Drive On MacBook Pro, Air Or iMac

Power up,log into your Mac. Plug in your Seagate’s USB cable.

YourSeagate external hard drive connects to your Mac by its USB cable.

The Seagateportable drives receive their power from your Mac by the USB cable.

And thatmeans you’ll have to have enough battery power in your MacBook. Enough to poweryour Seagate external hard drive.

If yourbattery is low you’ll need to plug your MacBook into power.

And if yourSeagate is a desktop drive it’ll have its own power cable. Plug your desktopSeagate drive into power before connecting it up to your powered up Mac.

How To Permanently Delete Files From Mac Hard Drive Recovery

When yourSeagate external drive is plugged into your Mac and has power its light willblink. And in a few moments your Mac will show the drive icon on your desktop.

No driveicon?

Open afinder window and check your Finder preferences.

Take a lookat your finder preferences. And make sure the ‘Hard Disks’ and ‘External Disks’menu options are checked.

7. You Can Give Your Seagate External Hard Drive A New Name

Just clickthe text under your Seagate’s drive icon and type in a new name.

8. How To Open Your Seagate External Hard Drive On Your Mac?

Doubleclick on your Seagate external drive icon. And you’ll open up a new finderwindow.

And thereyou have it. You’ve opened up your Seagate drive on your Mac.

9. Seagate’s Pre-loaded External Hard Drive Files For Mac

You mayhave opened a finder window on your Seagate External hard drive. And saw thereis already something on there. Particularly if you haven’t formatted your Seagate drive.

Seagate Technology puts some files already on your Seagate drive.

Reformat Imac Hard Drive

You can usethose files to register your Seagate External hard drive for warranty. And todownload Seagate’s programs.

Doubleclick on ‘start_here_mac’. This is the file to use on a Mac. The Seagate Dashboard will open up.

There youcan register your Seagate Backup drive.

How To Permanently Delete Files From Mac Hard Drive Using

You canwatch this 1 minute 52 second video. The video walks you through usingstart_here_mac to register your Seagate hard drive for warranty.

Toolkit for MacOS – First Time Setup

VideoCredit: AskSeagate

10. How To Create A Folder On Your Seagate Hard Drive On Your Mac

You caneasily create new folders. And store your documents, photos whatever you wanton your Seagate external drive.

Doubleclick on your Seagate’s drive icon on your desktop. That will open up a finderwindow.

Clickinside that finder window to select it.

At the topof your desktop pick File. Then pick NewFolder from the menu.

Click onyour untitled folder and type in a name.

And thereyou have created a new folder on your Seagate hard drive. And you’ve learnt howto give your new folder a name.

11. How To Use Seagate External Hard Drive For Drag And Drop On Mac

And how tocopy and paste your files to your Seagate drive.

Now you’veopened up a finder window on your Seagate External hard drive. You’re ready toput some files on there.

Drag And Drop From Your Mac To Your Seagate Drive

When you’redragging and dropping your files. You’re moving the files from where they areon your Mac to your Seagate external drive.

It is theway to free up space on your Mac’s internal drives.

But, ifthese are the only copy of your files, you should have a copy of them somewhereelse as well. Maybe in a backup you’vealready taken of your Mac.

Or take acopy of your Seagate drive by cloning it to another Seagate external drive.

You can find out how here.

Open asecond finder window on your Mac and move through your folders to the files youwant to drag and drop. You can also drag and drop folders this way.

You canclick on each one.

Want tochoose more than one?

Hold downthe shift key and click on the other files you want to choose.

Click andhold on the highlighted file(s). Move your cursor over to the window on yourSeagate external drive. And when you see a highlight around the window liftyour finger and drop them there.

If you’redropping a lot of files. Or dropping a folder with a lot of files in it. it maytake a while. Your Mac will show you a progress bar if there are a lot offiles.

12. Copy And Paste From Your Mac To Your Seagate Drive

This islike dragging and dropping your files. But this time you’re take a copy of yourfiles and putting them onto your Seagate drive.

Open up afinder window on your Mac. And move to the files you want to copy.

Click onthe file. Or shift and Click to choose more.

Or you canuse a selection window.

Click yourcursor in an empty space near your files. Click and hold. Move your cursoracross all the files you want to choose.

When allthe files you want are highlighted. Look at the top of your finder window andclick edit. Pick copy from the menu.

Your Macwill copy the files.

Move yourcursor to the open finder window on your Seagate external hard drive. Click onthat finder window.

Then at thetop of your finder window click on Edit. And pick Paste from the menu.

Your Macwill take a few moments to copy the files across.

13. How To Delete Files On Your Seagate External Hard Drive On Mac

When you want to delete some files fromyour Seagate external hard drive it’s easy.

You double click on your Seagate’s driveicon on your desktop. And open up a new finder window.

Click on each file or folder you want to delete. You can use Shift and click to choose morefiles or folders.

Then you can just press the Delete key onyour keyboard.

Or you can right click once you havepicked the files and pick move to trash from the menu.

Once you have deleted your files. And tomake sure you’re not left with ghost images of those files on your Seagatedrive. Go to your Mac’s trash and empty it.

14. When You’re Finished Using Your Seagate External Hard Drive On Your Mac

Before you pull out your USB cable orpower down your desktop Seagate drive. Eject your drive first.

Your Mac holds information in its memorywhile you’re using your Seagate drive on your Mac.

To stop yourself corrupting your files onthe drive. Always eject your Seagate external drive first.

You do this by right clicking on yourSeagate’s drive icon.

And from the menu you choose Eject.

Wait a few moments for your Mac to writeeverything down to the drive from its memory. And once the drive icon has disappeared from your desktop you can plugout your USB cable.

Wait for your drive to power down and thenyou’re free to move and put away your Seagate drive.

Can

15. Using Your Seagate External Hard Drive For Your Backups

You can useyour Seagate external hard drive for your Time Machine backups. And keep a copyof your entire Mac should anything bad happen to your Mac.

You’ll first need to format your Seagateexternal hard drive to Mac OS Extended (Journaled) file system. As that is the file system your Mac uses fora Time Machine backup.

You can format your external drive using the instructions in an article here.

After formatting you connect up your Seagate hard drive to Time Machine. Something that’s really quick to do. You’ll find an article on how to do it here.

16. How To Use Your Seagate External Hard Drive On Mac And Windows

When you’vebought a Seagate drive formatted as ExFAT. The drive is already set up for youto use on a Mac and a Windows PC.

You can usethe instructions above to open the drive up on your Mac. You can drag and dropfiles to your Seagate external hard drive. Copy and paste your files on the drive.

And use thesame actions to take files off your Seagate drive onto your Mac.

Or you canstart up a compatible program on your Mac.

Then openfiles put on your Seagate external drive by a Windows PC. And use them on yourMac.

Here are acouple of examples.

  • You can start up iTunes. And open MP3 files put on your Seagate external drive by a Windows PC. And iTunes will start to play them.
  • You can start up the photos app on your Mac. Open up a JPEG photo on the Seagate drive put on there by a Windows PC. And view them on your Mac. Or edit them on your Mac.
  • You can start up Excel on your Mac. Open up an Excel spreadsheet put on your Seagate external drive by a PC. And make your changes.

When you’reready to plug out your Seagate be sure to Eject your drive before pulling outits USB cable.

You cantake your Seagate drive over to your Windows PC and open up the drive there.

Justremember that you’ll need a program on the Mac or the Windows PC that can readthose files.

Andremember that Application programs are different.

You can’tswap them from a Mac to a Windows PC. Aprogram made for a Mac has to run on a Mac.

Just thesame as a program made for a Windows PC has to run on a Windows PC.

Last Words

And now you know 16 ways to use yourSeagate external hard drive on your Mac. Please have a look at my other Seagatedocuments on the site.

Related Documents


Certain images are produced withpermission from Seagate Technology.

Dec 04, 2021 Mac hard drive formatting steps: Run AweEraser for Mac Choose 'Erase Hard Drive' Select hard drive Click on 'Erase' button Format the selected hard drive. Please note that once the hard drive is formatted by AweEraser for Mac, all the data on the hard drive will be permanently erased, can't be recovered by data recovery software.

Most external hard drives are designed to work for Windows computers. So if you’re trying to connect an external hard drive to a Mac, you might have to format the drive before you can use it. Here’s how to do that:

How to Format a Hard Drive for Mac

Note: If you already used your external hard drive on a PC, be sure to back up any files on it. Formatting your drive will wipe out all the data in it.

  1. Connect an external hard drive to your Mac. Some external hard drives need to be plugged into an outlet to work.
  2. Go to Spotlight Search, type in Disk Utility, and click the first option. This will open the Disk Utility app, where you will find all the internal and external drives that are connected to your Mac.
  3. Then click View in the top-left corner of the window and select Show All Devices.
  4. Click the external hard drive you want to format. You can find this on the left-hand side of the screen under External Hard Drives. For the best result, select the disk (the highest option in the external tree).
  5. On the top menu, click Erase. This will open a small pop-up window with a warning that erasing the drive will delete all data stored on it and that it can’t be undone.
  6. Choose a name, format, and scheme for your drive. You can choose whatever name you want, and you should choose GUID Partition Map for the Scheme in most cases. However, you can choose between the following formats:
    • Mac OS Extended (Journaled) is the best option for most Mac users since it is compatible with all Macs.
    • APFS (Apple File System) is only for newer Macs running macOS 10.13 or later.
    • exFAT is compatible with both PC and Mac.
    • MS-DOS (FAT) is also compatible with Mac and PC, but you can only transfer files smaller than 4GB.
  7. When you’re done with providing the setup details, click Erase. This will immediately wipe the entire drive.

If you get an error message that states, “Erase process has failed. Click done tocontinue,” don’t freak out about it. This is an issue caused by Time Machine running on your externaldrive.

You will need to turn off Time Machine. You can do this by opening System Preferences and unchecking the boxnext to “Back Up Automatically”.Then click Options beside “ShowTime Machine in menu bar.” This will open another window. Click Cancel and it will turn off the Time Machine.

After you turn off the Time Machine, redo steps 4 to 6.

How to Partition an External Hard Drive on Mac

If you have formattedyour drive, you can then partition the drive, which will splitthe drive into two formats. This is perfect for anyone who uses Macs and PCsand wants to transfer files between the different operating systems with anexternal drive. Here’s how to do that:

  1. Open Disk Utility and select the drive that you want to partition. It is best to click View > Show All Devices so you can selectthe disk rather than a container.
  2. In the top menu, select Partition.
  3. Then click the plus sign at the bottom of the pie chart. Every time you click this plus sign, a new partition will becreated.
  4. Choose a name, format and size for each partition. You can also change the size of each of the partitions bydragging the white dots at the edge of the circle.
  5. Finally click Apply.

Why Partition a Hard Drive?

Partitioning an external hard drive allows youto have separate drives for Mac, PC, and any other operating system. Now youdon’t have to go out and buy hard drives for every computer you use.

A partition also gives you a dedicated space foryour Time Machine back-up files or a bootable backup of your operating system.It also helps protect your data if your drive gets infected with malware, as itwould be contained within one of the partitions.

Now that you know how to format an external drive for Mac, check out our blog on the difference between an HDD and an SDD.

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FAT32: compatible with Mac and Windows. However, FAT32 is a legacy file system designed for low capacity hard drives and it is not recommended for modern hard drives or operating systems. A FAT32 partition can reach up to 32GB when formatted on a Windows PC. How to choose the file system format. Use NTFS if: the storage device is connected. Dec 31, 2019 Partition External Hard Drive on Mac OS X. You should create multiple partitions on your external hard drive, in order to have enhanced file organization. This is very easy to carry out, and only requires a few moments of your time. In order to get started and partition your external hard drive, follow the simple instructions below. Feb 04, 2020 The MacBook and MacBook Pros come with an SSD to store data and an OS. When you use a hard disk drive, Time Machine will take a while to back up your Mac. You can get an external SSD (Samsung T5 500GB $89.99 from Amazon) and format for a reasonable price to use with your Mac’s Time Machine. The SSDs are fast, don’t need any external power. How to Format a USB Drive to FAT32 on Mac. As earlier stated, you need to first back up your USB drive before formatting the drive as you may not be able to recover the contents again. Now, you can follow the steps to be highlighted below to get it successfully formatted. 1 Format a USB Drive to FAT32 in Mac OS with Disk Utility.

Erasing your disk: For most reasons to erase, including when reformatting a disk or selling, giving away, or trading in your Mac, you should erase your entire disk.

Jan 15, 2015 When I selected the Partition tab and '1 Partition' it allowed me to format it as FAT32. I went and plugged it into the Time Capsule, and the drive shows up in the Airport Utility under the 'Disks' tab. However, something still isn't kosher here. When I open a Finder window and click on my Time Capsule, I see the external drive.

Erasing a volume on your disk: In other cases, such as when your disk contains multiple volumes (or partitions) and you don't want to erase them all, you can erase specific volumes on the disk.

How To Permanently Erase An External Hard Drive

Erasing a disk or volume permanently deletes all of its files. Before continuing, make sure that you have a backup of any files that you want to keep.

How To Erase And Format External Hard Drive Mac Os

How to erase your disk

  1. Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
    If you're not erasing the disk your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder.
  2. Choose View > Show All Devices from the menu bar in Disk Utility. The sidebar now shows your disks (devices) and any containers and volumes within them. The disk your Mac started up from is at the top of the list. In this example, Apple SSD is the startup disk:
  3. Select the disk that you want to erase. Don't see your disk?
  4. Click Erase, then complete these items:
    • Name: Type the name that you want the disk to have after you erase it.
    • Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
    • Scheme: Choose GUID Partition Map.
  5. Click Erase to begin erasing your disk and every container and volume within it. You might be asked to enter your Apple ID. Forgot your Apple ID?
  6. When done, quit Disk Utility.
  7. If you want your Mac to be able to start up from the disk you erased, reinstall macOS on the disk.

How to erase a volume on your disk

  1. Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
    If you're not erasing the volume your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder.
  2. In the sidebar of Disk Utility, select the volume that you want to erase. The volume your Mac started up from is named Macintosh HD, unless you changed its name. Don't see your volume?
  3. Click Erase, then complete these items:
    • Name: Type the name that you want the volume to have after you erase it.
    • Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
  4. If you see an Erase Volume Group button, the volume you selected is part of a volume group. In that case, you should erase the volume group. Otherwise, click Erase to erase just the selected volume. You might be asked to enter your Apple ID. Forgot your Apple ID?
  5. When done, quit Disk Utility.
  6. If you want your Mac to be able to start up from the volume you erased, reinstall macOS on that volume.

Reasons to erase

You can erase at any time, including in circumstances such as these:

  • You want to permanently erase all content from your Mac and restore it to factory settings. This is one of the final steps before selling, giving away, or trading in your Mac.
  • You're changing the format of a disk, such as from a PC format (FAT, ExFAT, or NTFS) to a Mac format (APFS or Mac OS Extended).
  • You received a message that your disk isn't readable by this computer.
  • You're trying to resolve a disk issue that Disk Utility can't repair.
  • The macOS installer doesn't see your disk or can't install on it. For example, the installer might say that your disk isn't formatted correctly, isn't using a GUID partition scheme, contains a newer version of the operating system, or can't be used to start up your computer.
  • The macOS installer says that you may not install to this volume because it is part of an Apple RAID.

About APFS and Mac OS Extended

Disk Utility in macOS High Sierra or later can erase using either the newer APFS (Apple File System) format or the older Mac OS Extended format, and it automatically chooses a compatible format for you.

How to choose between APFS and Mac OS Extended

Disk Utility tries to detect the type of storage and show the appropriate format in the Format menu. If it can't, it chooses Mac OS Extended, which works with all versions of macOS. If you want to change the format, answer these questions:

  • Are you formatting the disk that came built into your Mac?
    If the built-in disk came APFS-formatted, Disk Utility suggests APFS. Don't change it to Mac OS Extended.
  • Are you about to install macOS High Sierra or later for the first time on the disk?
    If you need to erase your disk before installing High Sierra or later for the first time on that disk, choose Mac OS Extended (Journaled). During installation, the macOS installer decides whether to automatically convert to APFS—without erasing your files.
  • Are you preparing a Time Machine backup disk or bootable installer?
    Choose Mac OS Extended (Journaled) for any disk that you plan to use as a Time Machine backup disk or as a bootable installer.
  • Will you be using the disk with another Mac?
    If the other Mac isn't using macOS High Sierra or later, choose Mac OS Extended (Journaled). Earlier versions of macOS don't work with APFS-formatted volumes.

How to identify the format currently in use

If you want to know which format is currently in use, use any of these methods:

  • Select the volume in the Disk Utility sidebar, then check the information shown on the right. For more detail, choose File > Get Info from the Disk Utility menu bar.
  • Open System Information and select Storage in the sidebar. The File System column on the right shows the format of each volume.
  • Select the volume in the Finder, then choose File > Get Info from the menu bar. The Get Info window shows the Format of that volume.

Erase External Hard Drive Mac Format

If your disk or volume doesn't appear, or the erase fails

  1. Shut down your Mac, then unplug all nonessential devices from your Mac.
  2. If you're erasing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on.
  3. If your disk or volume still doesn't appear in Disk Utility, or Disk Utility reports that the erase process failed, your disk or Mac might need service. If you need help, please contact Apple Support.

Learn more

Mac Os Format External Drive

How To Erase And Format External Hard Drive Mac Compatible

  • If you can't start up from macOS Recovery, you can use a different startup disk instead.
  • If Disk Utility shows a Security Options button in the Erase window, you can click that button to choose between a faster (but less secure) erase and a slower (but more secure) erase. Some older versions of Disk Utility offer the option to zero all data instead. These secure-erase options aren't offered or needed for solid-state drives (SSDs) and flash storage.