Why is the data on your drive valuable to hackers? In this article, I’ll explain how to securely erase all sorts of drives: hard drives, flash drives, and SSDs. Whenever you dispose of a Mac, or an external drive, you should securely erase it to ensure that no one can harvest data from it. If you use an external drive for, say, your music and video libraries, then this isn’t the case, but if you use an external drive for backups, there there’s lots of sensitive data on it. Your Mac’s drive is full of sensitive data: all your emails, contacts, private documents, and more. Your Mac, and any external drives you use, may contain important personal data. If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device.How To How to Securely Erase Data from Your Mac and External Drives 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. 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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