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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. Click Erase and wait for Disk Utility to prepare your external drive for you.
#Usb mac utility to erase hard drive mac os#
Give the external hard drive a suitable name and select Mac OS Extended (Journaled) as the drive’s format and GUID Partition Map as the drive’s partition scheme. You’ll then be prompted to select the hard drive you want to erase double-check before inserting the CD or USB at the beginning of this process that you know what the drive is called, as there is no going back after this point. 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. Select your external hard drive (not just a single partition). 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.
#Usb mac utility to erase hard drive download#
Download the Universal USB-Installer, which converts the.
#Usb mac utility to erase hard drive iso#
iso image from Insert a USB flash drive with 32MB+ available space. If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. Make a bootable USB flash drive to wipe an old hard drive. 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.