![]() If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device. ![]() Double left-click on the Mac HD, the internal Mac hard drive visible on the top-right corner of the desktop. To partition and format the drive with Disk Utility, follow these steps: Attach the drive to the computer. If you have any files you want to save, copy them to another storage device. Mac OSX 10.9.x, and 10.10.x include a built in utility known as Disk Utility that can be used to partition and format a hard drive. Erasing a storage device deletes everything on it. Secure erase options are available only for some types of storage devices. Select version: Table of Contents Erase and reformat a storage device in Disk Utility on Mac In Disk Utility on Mac, you can erase and reformat storage devices to use with your Mac. How-To How to find an external drive that’s not showing up on a Mac Heres what to do when you cant access an external drive on your Mac because the USB drive isnt showing up. (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. 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. 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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