Erase mac hard drive no disk

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  1. Key Features and Benefits
  2. Macbook won't let me unmount drive in order to erase it? | Tom's Guide Forum
  3. Mac 911: How to erase your Mac's hard drive the right way
  4. Disk Wiper 15 for Mac OS X Free

Key Features and Benefits

Both methods may adversely affect future performance of the drive, but are very effective at deterring file recovery efforts. The Best Tech Newsletter Anywhere. Join , subscribers and get a daily digest of news, comics, trivia, reviews, and more. Windows Mac iPhone Android.


  1. macos - No disk to erase in Disk Utility Internet Recovery - Ask Different?
  2. Even better with SSD and FileVault 2;
  3. How to Securely Erase Your Mac's SSD - The Mac Observer!
  4. Why Paragon Disk Wiper for Mac?!

Smarthome Office Security Linux. The Best Tech Newsletter Anywhere Join , subscribers and get a daily digest of news, geek trivia, and our feature articles. Skip to content. You received a message that your disk isn't readable by this computer. The macOS installer doesn't see your disk or can't install on it.

Macbook won't let me unmount drive in order to erase it? | Tom's Guide Forum

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. Identify the current format 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 on the right. The File System column on the right shows the format of each volume. The Get Info window shows the Format of that volume.

Mac 911: How to erase your Mac's hard drive the right way

Yes No. Character limit: Maximum character limit is Start a Discussion in Apple Support Communities. 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.

Disk Wiper 15 for Mac OS X Free

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. Each disk and volume is identified by the same name and icon that it displays on the Mac desktop.

Will Disk Utility Erase Files

Click the Erase tab. Select a volume from the disks and volumes listed on the left side of the Disk Utility window. It removes the volume's catalog directory but leaves the actual data intact. Zero Out Data — This method provides a good level of security. It erases the volume's data by writing over it with zeros. The length of time this method takes depends on the size of the volume.

Department of Defense's M standards for erasing magnetic media. It writes over the data on a volume 35 times. Don't expect this erase method to finish any time soon. Fastest — This is the quickest erase method.

How to Backup Clone Mac Hard Disk to SSD Drive (Disk Utility)

It doesn't scramble the file data, which means a recovery app may be able to resurrect the erased data. Zero Out the Data — This erase method writes a single path of zeros to all locations on the selected volume or disk. Advanced recovery techniques could restore the data, but it would require a great deal of time and effort. It writes two passes of random data to the volume or disk and then writes a single pass of a known data pattern to the volume or disk.

Most Secure — This method of securely erasing a volume or disk meets the requirements of the U. The erased volume is written to seven times to ensure the data can't be restored.