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Format Ssd For Mac

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Apple uses a 'blade-style' SSD (similar to mSATA) in the 2010-2012 Macbook Air and retina Macbook Pro. And with the newest version of the Macbook Air, Apple has changed formats again to SSD chips controlled by PCI-e. All that to say that Secure Erase is not a viable option. MacOS High Sierra: Why you can't format an internal SSD with HFS+ format But you can downgrade and reformat for an older version of macOS. Start up your Mac from it, and then use Disk Utility.

  1. How to Format or Reformat SSD on Mac? By Shirly Chen, 2017-12-01. A Solid State Drive is primarily used on Mac machine. If you want to recycle a SSD, formatting is the.
  2. Name: Enter a name that you want the disk to have after you erase it, such as Apple SSD. Format: To format as a Mac disk, choose either APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default. Scheme: Choose the appropriate partition map scheme. Click Erase to begin erasing.
  3. Format new SSD as OS X Extended (Journaled) from PC. Ask Question. I’ve ordered a USB to SATA cable to format the drive from another Mac, but can I format the drive, as OS X extended journaled, in Windows? Tl:dr - How do I format (or partition) a clean SSD as OS X Extended (Journaled), as opposed to exFAT etc., from a PC?

This guide uses Mac OS X El Capitan Version 10.11.5. Procedure may be different with other OS versions.

1. Connect your SanDisk® SSD to your Apple Mac system via USB adaptor, the Mac OS will pop up a message: 'The disk you inserted was not readable by this computer', please select Initialize

2. Disk Utility will pop up, if not, open Disk Utility and you shall see the SSD listed under External

3. Select the SSD and then select Erase button on top of disk utility

4. Input your desired name of the partition, if you plan to install Mac OS onto the partition,choose OS X Extended(Journaled) as format. Otherwise you can choose either OS X Extended or ExFAT as format. Please choose GUID Partition Map as Scheme. After you click Erase, the erase will start and the partition you created will appear under the drive on left side of Disk Utility.

5. You can also create multiple partitions in one SSD. In Disk Utility, select the SSD(not the partition under), then select Partition button on top of Disk Utility.

6. Input new partition name, and use '+' and '-' button on the left to determine the size of the partition. Then select ' Apply'

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 a disk

Proceed based on whether you're erasing your startup disk or some other disk. Your startup disk is the disk (volume) that your Mac started up from. By default it's the disk built into your Mac, named Macintosh HD. If you're selling, giving away, or trading in your Mac, you should erase your startup disk.

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Erase a startup disk

  1. Start up from macOS Recovery.
  2. Select Disk Utility from the Utilities window in macOS Recovery. Then click Continue.
  3. Make sure that the sidebar in Disk Utility shows the name of your startup disk. The volume representing your startup disk is Macintosh HD, unless you renamed it. Don't see it?
  4. Look for a ”Data” volume with the same name, such as ”Macintosh HD - Data.” If you have such a volume, select it. Then choose Edit > Delete APFS Volume from the menu bar, or click the remove volume button (–) in the Disk Utility toolbar. Do the same to delete any other volumes you might have on your startup disk—except the volume named Macintosh HD.
  5. Now select Macintosh HD.
  6. Click the Erase button or tab, then complete these items:
    • Name: Enter a name that you want the volume to have after you erase it, such as Macintosh HD.
    • Format: Choose either APFS or Mac OS Extended (Journaled) to format as a Mac volume. Disk Utility shows the recommended Mac format by default.
  7. Click Erase to begin erasing. You might be prompted to enter your Apple ID.
  8. When done, quit Disk Utility to return to the Utilities window.
  9. If you want your Mac to be able to start up from this volume again, choose Reinstall macOS from the Utilities window.

Erase some other disk

The steps above also work when erasing a storage device that you're not using as a startup disk. However, in that case it's not necessary to open Disk Utility from macOS Recovery: you can instead open it from the Utilities folder of your Applications folder. And you don't need to delete data volumes first: just select your disk in Disk Utility, then click Erase.

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How to change the partition map (scheme) of a disk

In some circumstances, you might need to change the partition map (scheme) while erasing. If you're following instructions that require choosing a scheme, the steps in Disk Utility differ from the steps above.

  1. After opening Disk Utility, choose View > Show All Devices from the menu bar.
  2. The sidebar now shows not just volumes, but also the disks (devices) that contain those volumes. In the following example, APPLE SSD is the disk, Container disk1 is a container on that disk, and Macintosh HD is a volume in that container. (Only APFS-formatted disks have containers.)
  3. Select the disk that you want to erase, such as Apple SSD.
  4. Check the information shown on the right side of the window to find out which partition map is currently in use:
    • GUID Partition Map is appropriate for Mac disks.
    • Master Boot Record is appropriate for secondary or external drives used with a PC or Boot Camp.
  5. If the partition map is not appropriate for the disk's intended use, click the Erase button or tab, then complete these items:
    • Name: Enter a name that you want the disk to have after you erase it, such as Apple SSD.
    • Format: To format as a Mac disk, choose either APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
    • Scheme: Choose the appropriate partition map scheme.
  6. Click Erase to begin erasing. If you're erasing your startup disk, you might be prompted to enter your Apple ID.
  7. Quit Disk Utility when done.

Why erase a disk

You can erase a disk or volume at any time, including in circumstances such as these:

  • You want to quickly and permanently erase all content from your Mac and restore it to factory settings, such as when you're 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 most disks and volumes for Mac 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.

Identify the current format

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

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  • Select the volume in the Disk Utility sidebar, then check the information 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.

Choose between APFS and Mac OS Extended

If you want to change the format, answer these questions:

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Are you formatting the disk that came built into your Mac?
If the built-in disk came APFS-formatted, don't change it to Mac OS Extended.

Are you about to install macOS High Sierra or later 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:

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  • macOS Mojave or later: The installer converts from Mac OS Extended to APFS.
  • macOS High Sierra: The installer converts from Mac OS Extended to APFS only if the volume is on an SSD or other all-flash storage device. Fusion Drives and traditional hard disk drives (HDDs) aren't converted.

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Are you preparing a Time Machine backup disk or bootable installer?
Choose Mac OS Extended (Journaled) for any disk that you plan to use with Time Machine or as a bootable installer.

Will you be using the disk with another Mac?
If the other Mac isn't using High Sierra or later, choose Mac OS Extended (Journaled). Earlier versions of macOS don't mount APFS-formatted volumes.

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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 your disk doesn't appear in Disk Utility

Mac

If Disk Utility doesn't show a sidebar, choose View > Show Sidebar from the menu bar.

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If Disk Utility shows the sidebar, but your disk doesn't appear within it, disconnect all nonessential devices from your Mac. If the disk is external, leave it connected, but make sure that it's turned on and connected directly to your Mac using a good cable. Then restart your Mac and try again. If your disk still doesn't appear, your disk or Mac might need service. Learn how to get your Mac ready for service.

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Learn more

  • If you can't start up from macOS Recovery, you can instead use a different startup disk, if you have one.