If one of the volumes is posing problems, you won't be able to erase the disk. When you erase a disk, you are handing with all volumes it contains. If Mac won't format the external hard drive as before, try solution 2. Then select the drive and click First Aid at the top menu bar to check and repair errors related to the directory structure or formatting of the drive.Now plug in your hard drive and launch Disk Utility.Click the Apple logo > Restart to reboot your Mac to reset the system processes that may have been disrupted while using it.On the left sidebar of Disk Utility, click the Eject icon next to your SD card or hard drives to safely eject the disk.Steps really work? Share it on your social platforms! If you are experiencing the "erase process has failed on mac" error while formatting external hard drives on MacBooks, MacBook Pros, and MacBook Airs, read on to get it resolved. Try to boot from a USB installer to format your drive or forcibly erase the Mac hard drive in Terminal using the steps detailed in the next section. Suppose formatting in Internet Recovery Mode is not helpful. Once you boot into Internet Recovery, follow the same procedure to erase the Mac hard drive as in Recovery mode. It allows your Mac to contact Apple's Internet Recovery server for the disk image to boot your Mac into recovery mode.Īlthough the extra process for downloading the disk image (the latest macOS compatible with your Mac) takes time, many users managed to erase the Mac hard drive when it failed in Recovery Mode. Internet Recovery Mode is similar to the standard Recovery mode, only that it doesn't rely on the recovery partition to access Disk Utility. Solution 2: Format the drive in Internet Recovery Mode If you get the error "Wiping volume data to prevent future accidental probing failed," continue reading this guide for the solutions. Wiping Volume Data to Prevent Future Accidental Probing Failed Problem solved? Share your joy with others. Nevertheless, If Disk Utility still can't erase the Mac hard drive, please repair it with First Aid. But, if you did choose the volume and still failed, you can click View > Show All Devices to display all the drives, then erase the drive itself to see if it succeeds. We recommend you erase the volume but not the entire disk to avoid the "Secure Disk Erase Failed - Couldn't Unmount Disk" error. Then keep the Scheme as GUID Partition Map.
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