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. 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. Free to edit, delete, write files on NTFS disks in Mac. Ĭlick the Scheme pop-up menu, then choose GUID Partition Map. This passage will help you figure out the reasons and find corresponding solutions about the read-only file system on Mac. Click Erase Volume Group (or Erase if that button isn't shown) to wipe the drive. In the sidebar, select the storage device you want to erase, then click the Erase button. Keep the name as Macintosh HD and make sure the format is set to APFS or Mac OS Extended (Journaled). If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. The instructions do not differ when formatting different capacity sizes, this is not capacity specific.Internal drives do not ship pre-formatted and will need to be Partitioned and formatted before being used.Please refer to Answer ID 25242: How To Format an External Drive or Memory Card to Out of Box and OS Compatability.Įxternal hard drives come pre-formatted and ready for use.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.
The instructions in the article below are designed to help repartition and format a hard drive.
Briefly, APFS, known as Apple File System, is the latest file system. Once the process begins, ALL THE DATA ON THE DRIVE WILL BE LOST! This process is Data Destructive and cannot be undone. APFS and Mac OS Extended (Journaled) are the two best formats for using on Mac disk. Western Digital does not recommend multiple partitions due to potential corruption of the Partition table.Western Digital recommends that when formatting a drive that it be the only drive present on the system to limit occurences of accidental data loss. The partition table is used to display each partition within the Operating System and if this becomes corrupted it will lead to data loss. If this is the first time connecting an external device to a macOS, refer to the section titled Operating System Compatibility for help formatting the drive.Please contact Microsoft or Apple for more support.
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