How to Use your Mac’s Disk Utility to Partition, Wipe, Repair, Restore, and Copy Drives

You don’t need fancy partitioning tools or disk managers to manage partitions on your Mac. You can do so using the built-in Disk Utility tool. But be sure to back up your drive beforehand as these procedures result in data loss.

To open Disk Utility, go to Finder and click on Applications. Then click on Utilities > Disk Utility.

Once you have located Disk Utility, you can follow the sections below depending on the need of your situation. In this article, we explain how to partition, erase, repair file systems and restore images using Disk Utility.

How to partition drives using Disk Utility

After opening Disk Utility, you will see a list of all drives. Select the hard drive in question i.e. the hard drive where you wish to create partitions.

  1. Click on the Partition tab and then click on the ‘+’ sign
  2. Use the size controls to personalize the size of the partition you wish to create
  3. Assign a name to the new partition and click Apply

This will create a new partition on the selected hard drive. In the next section, we will see how to erase a partition.

Erase a partition using Disk Utility

Open Disk Utility and you will be shown a list of all drives. To erase a partition, click on a hard drive and select Erase. Once you select Erase, you have an option to select security features to erase a drive.

Select high security if you want your data to be overwritten multiple times, so data recovery software cannot retrieve it. If not you can select the fastest erase option, which is not very secure, meaning data recovery tools can retrieve data if you select this option. Once the security options are selected, click on Erase to begin the process. Once the process completes, the drive will be erased.

Repair issues with file systems

First Aid feature in Disk Utility is a great tool to check and repair file system errors. You can use this feature when the external device doesn’t work properly or if a file is corrupt and you want to debug the drive. Of course, First Aid can also repair issues with your internal hard drive, for which you will have to access Disk Utility through recovery mode.

  1. Once you open Disk Utility, drives will be listed. But if you don’t see the drive, click on View > Show all devices
  2. Select the drive you wish to repair
  3. Click First Aid and then click Run. If the repair is complete, you will receive a success message. If it reports an error, you will have to further examine. In some cases, running First Aid again may resolve the issue.

Restore disk images

Disk images are a wonderful creation that allows you to make a copy an entire partition. These images can then be restored on to another partition. To create a disk image, follow the steps below.

  1. In Disk Utility, select the volume of which you want to make a disk image
  2. Then click on File > New Image
  3. Then select Image from <Name of the partition>

Once the image is created, you can also restore it easily by following the steps below. To restore an image, you will need a partition that is empty.

  1. In the left menu, select the volume you want to restore. This is the volume that is erased and prepared for restore.
  2. Then click Edit and choose Restore
  3. In the pop-up window, click on the Image button and select the disk image
  4. Finally, click on Restore to restore the disk image

You can use Disk Utility to perform disk management functions like partition drives, repair and restore them. It is a powerful tool that can be accessed through recovery when your Mac doesn’t boot or when there are issues with the internal drive.

If you lose data after performing these procedures and no backup is available, you can use data recovery tools such as Yodot to your rescue. Yodot Recovery software can also be used to recover data due to damaged Apple partition map in Mac.