![]() ![]() If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device. In the settings where you select a volume, select your. In the Recovery app window, select Reinstall for your macOS release, then click Continue. Reinstall your current version of macOS: Command-R. Secure erase options are available only for some types of storage devices. Reinstall your computer’s original version of macOS (including available updates): Option-Shift-Command-R. ![]() (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. Here is how to get an older version of Mac OS X from the Mac App Store (this only works if you’ve downloaded it in the past and it won’t work if you have already installed Mojave or later. 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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