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.
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. If you are getting a macOS 'Erase process has failed' error while formatting an external device, follow the steps below. 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. Step 3: Using the 'erase disk' or 'erase volume' command, erase a disk or a volume, respectively. You can do this while using Internet Recovery, because it does not use your drive. You can not completely else the entire Drive form Recovery HD, because that would erase Recovery HD while you were running from it. Step 2: Open Terminal as administrator and type 'diskutil list.' That will show data regarding different disks and volumes in your Mac. You cannot use the one in MacOS, because that would erase MacOS as you were running from it. If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. Fix 1: Erase Disk via Terminal Step 1: Go to Finder and explore Applications > Utility. 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.
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