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If you’ve booted from the startup disk rather than the Recovery partition, the Erase button is grayed out and cannot be pressed. In this case, reboot and hold down Command (⌘) – R again to boot into the Recovery partition. Before the erasure begins, you’re asked to select a disk format.
How do I enable Secure Erase?
How to use Disk Sanitizer or Secure Erase
- Turn on or restart the computer.
- While the display is blank, press the F10 key repeatedly to enter the BIOS settings menu.
- Select Security.
- Select Hard Drive Utilities or Hard Drive Tools.
- Select Secure Erase or Disk Sanitizer to open the tool.
How do I use 7 pass erase on Mac?
After you boot, launch Disk Utility, select the startup volume, and click the Erase tab. Now use the Erase Free Space option, which also offers 1, 3, and 7 passes of erase, and only empties out unused parts of the disk.
Why won’t my Mac let me erase my disk?
It’s not usually possible to erase the startup disk because your Mac is using it to run macOS. Recovery Mode is a special partition on your Mac you can use to restore from a backup, reinstall macOS, get online support, or erase your startup disk. You should back up your Mac before trying to erase or reformat it.
What happens if I run the erasedisk command?
It’s important to keep in mind that if you run the eraseDisk command, the target disk is going to lose all its data, so make sure you are erasing the proper disk. If you need different system format types, here are a few references you could use instead of JHFS+:
How to erase or reformat a drive in Disk Utility?
Open Disk Utility and select View > Show All Devices from the menu bar. You should see the device names for each of your drives appear in the sidebar. Alternatively, use the shortcut Cmd + 2. Select the parent folder for the drive you want to reformat or erase, then click the Erase button again.
Is there a way to erase a hard drive?
When you’re ready, here’s how to erase or reformat drives: Open Disk Utility from the Utilities folder in your Applications. Spotlight is the quickest way to open Disk Utility. In the sidebar, select the drive you want to erase or reformat.
Why is Disk Utility not working on MacBook Pro?
You can’t reformat a drive in macOS Disk Utility when the Erase button is grayed out. This might happen for a variety of reasons, all of which keep you from erasing or reformatting the drives connected to your Mac. If your MacBook’s Disk Utility won’t let you erase drives, follow the steps below to fix it.