That means a file named “john_smith_portrait.jpg” and the file “John_Smith_Portrait.jpg” could exist separately side by side. Unlike the standard in the Mac universe, “Mac OS Extended-Case-sensitive” adds another layer of specificity to file and folder names based on capitalization. ![]() “Mac OS Extended-Encrypted” uses password-protected encryption to secure the data on individual disk partitions. For several years, the Mac formatting standard has been “Mac OS Extended-Journaled,” which helps prevent corrupted data in case of power outage, improper ejection or drive failures. If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device.There are actually a few subcategories in the Mac OS Extended family, which can be selected when formatting a drive in Mac’s Disk Utility. 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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