![]() ![]() 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. ![]() And beneath each disk you should see any containers and volumes on that disk. and press Most users use Disk Utility to erase a disk or hard drive. The sidebar in Disk Utility should now show each available disk or other storage device, beginning with your startup disk. Whats needed for a clean install on a Mac A backup of the disk before its erased. 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 disk in Disk Utility Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility. 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. Procedure Select source and target disk appropriately Click the Preferences button and check Repair permissions before cloning, Delete directories before. If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. 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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