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If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device. Secure erase options are available only for some types of storage devices. (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased data, then click OK. Invalid extent entry The volume could not be verified completely. If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to erase-it’s at the top of the hierarchy.Ĭlick the Format pop-up menu, then choose a file system format. Also, when I start up Disk Utility, it takes a long time to appear on the list on the left hand side and when it does and I attempt to use First Aid, it fails and gives the following text: Repairing file system. Ĭlick the Scheme pop-up menu, then choose GUID Partition Map. In the sidebar, select the storage device you want to erase, then click the Erase button. If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. Here is the requested information: OneDrive version: 18.214.1021. Instead, it unmounts the other volume (Mac Disk).
#DISK UTILITY VOLUME COULD NOT BE UNMOUNTED MAC MAC#
: (-69565) Operation failed Selecting Mac Disk Data and clicking Unmount does not unmount it. The repair cannot be performed because one or move volumes are mounted. See Erase and reformat a storage device.Note: If you want to get your Mac ready to trade in, sell, or give away, and your computer is a Mac with Apple silicon or an Intel-based Mac with an Apple T2 Security Chip, use Erase Assistant. Restoring the original state found as mounted. You can’t delete or erase your startup volume. When the operation is finished, click Done. Views Last Modified: Deleting a RAID volume will reset the hard disk drives.
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If the APFS volume you want to erase isn’t a member of a volume group, click the Erase button to erase the selected volume. One can remove a device from the array after marking it as faulty. If the APFS volume you want to erase is a member of a volume group, click the Erase Volume Group button to erase all volumes in the group, or click the Erase button to erase only the selected volume. If you want to change the format, click the Format pop-up menu, then choose an APFS format. See the Apple Support article About macOS Recovery.Įnter a new name for the volume, if desired. To erase the volume, you need to run Disk Utility in macOS Recovery. If the Erase button is dimmed, the selected volume can’t be erased because it’s in use. If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon. In the Disk Utility app on your Mac, select the APFS volume you want to erase in the sidebar. When you erase a volume, all the data on the volume is permanently erased, and the empty volume remains in the container.