10.08.2020

Mac Os Disk Utility Software

Mac Os Disk Utility Software 4,2/5 2861 votes

Summary: In this blog, we will share two methods to create a disk image-the first one using macOS Catalina’s Disk Utility and the second using a Mac data recovery application.
Read on to know the steps and benefits of these methods. Also, make sure you avail the free trial version of Stellar Data Recovery application.

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Disk image of an external or an inbuilt Mac storage drive is immensely helpful in recovering files in case the source drive fails or dies. You can create a disk image of your APFS or HFS drive on a larger storage medium and access it at a later point of time.

Create a Disk Image Using Disk Utility on macOS Catalina

macOS Catalina’s inbuilt Disk Utility provides an option to select a mounted storage drive be it internal or external SSD/HDD and create a disk image (.DMG) file to a location other than the source disk. The systematic steps to create a disk image of a drive using Disk Utility are as follows:

  1. Open DiskUtility and select the storage drive from the sidebar
  2. Go to File > New Image > Image from “DriveName
  3. Give a name to your disk image file and provide a destination to save the file
  4. Click the Format popup menu, then choose your required option
  5. If you want to limit the access of this disk image file, then click the Encryption popup menu to set a password for its access
  6. Click Save to continue the imaging process
  7. Click Done once the imaging process is over

Disk Utility mounts the image file’s disk icon on the desktop and sidebar of Finder. You can use the mounted image file to open its content.

Create a Disk Image Using a Mac Data Recovery Utility on macOS Catalina

The third-party data recovery utility, Stellar Data Recovery Professional for Mac also allows you to create a disk image (.DMG) file of the inbuilt Mac storage drive/volume or an external storage device. The logical steps to create a disk image of a drive using the utility are as follows:

Step 1)Download and install Stellar Data Recovery Professional on your Mac with installed macOS Catalina (or later macOS/OSX)

Step 2) Launch the software and select RecoverData from the main interface

Step 3) Click the ‘2nd‘ icon present at the top of the interface and select CreateImage

Step 4) From the “CreateImage” screen, select a drive or a volume to create an image file

Step 5) If you wish to create an image of the entire selected storage location, click Next

Step 6) If you wish to select the range to create an image, click the AdvancedSettings

  • From the “SelectRangetoCreateImage” screen, drag the sliders to define the starting and ending sectors of the image file
  • Click Close and then click Next

Step 7) In the “CreatingMediaImagetoSave” dialog box, locate the destination where you wish to save the image file

Step 8) In the “SaveAs” text box, type the disk image name and then click Save

This completes the disk imaging process using the software. Unlike Disk Utility, macOS Catalina does not mount this image file for you to access its data. Nevertheless, you can keep this newly created disk image as a backup and use it to recover data at the time of data loss.

Recover Data from a Disk Image Using the Software

The methodical steps to use the .DMG file for data recovery are as follows:

Step 1) Launch the software and select Recover Data from the main interface

Step 2) Click the ‘2nd’ icon present at the top of the interface and select Load Image

Step 3) From the “Load Image” screen, select the .DMG file or else click Add to add the image file

Step 4) Click Scan to start the recovery process

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Step 5) Once the scan is over, preview and select the required files then click Recover

Step 6) Specify the save location and click Save. You can find the recovered data in the saved location. Watch the below video for the process.

Conclusion

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We hope the blog helped you in understanding the practical details of how you can create a disk image file of a storage drive on macOS Catalina. By implementing Disk Utility, you can generate a disk image file and can open the automatically mounted image file from the saved location. On the contrary, by using Stellar Data Recovery Professional for Mac, you create a disk image file and use it to scan and recover lost, deleted, or inaccessible files.

Unlike Disk Utility, the software allows you to select the specific region of the drive for image creation. We recommend this method to recover files from a storage drive that is too big in size. For instance, if your storage drive has the data storage capacity of say 8 TB, then you need to recover data in portions. Free download the software to create an image, scan, and preview files. Register the software to save the recoverable files.

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macOS Recovery is part of the built-in recovery system of your Mac. You can start up from macOS Recovery and use its utilities to recover from certain software issues or take other actions on your Mac.

Hard Disk Utility Software

How to start up from macOS Recovery

  1. Turn on your Mac and immediately press and hold these two keys: Command (⌘) and R. Need help?
  2. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
  3. You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
  4. Startup is complete when you see the utilities window:
  5. After starting up from macOS Recovery, select a utility, then click Continue:
    • Restore From Time Machine Backup:Restore your Mac from a Time Machine backup.
    • Reinstall macOS: Download and reinstall the Mac operating system.
    • Get Help Online: Use Safari to browse the web and find help for your Mac. Links to Apple's support website are included. Browser plug-ins and extensions are disabled.
    • Disk Utility: Use Disk Utility to repair your disk or erase your disk or other storage device.

      Additional utilities are available from the Utilities menu in the menu bar: Startup Security Utility (or Firmware Password Utility), Network Utility, and Terminal.
  6. To quit macOS Recovery, choose Restart or Shut Down from the Apple menu . If you want to choose a different startup disk before quitting, choose Startup Disk from the Apple menu.

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If you can't start up from macOS Recovery

If your Mac can't start up from its built-in macOS Recovery system, it might try to start up from macOS Recovery over the Internet. When that happens, you see a spinning globe instead of an Apple logo during startup:

No Disk Utility On Mac

To manually start up from Internet Recovery, press and hold either of these key combinations at startup:

  • Option-Command-R
  • Shift-Option-Command-R
    Learn more

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If startup from Internet Recovery is unsuccessful, you see a globe with an alert symbol (exclamation point):

In that case, try these solutions:

  • Make sure that your Mac can connect to the Internet. If you're not prompted to choose a Wi-Fi network during startup, move your pointer to the top of the screen, then choose a network from the Wi-Fi menu , if available.
  • Press Command-R at startup to try using the built-in Recovery system instead of Internet Recovery.
  • Connect to the Internet using Ethernet instead of Wi-Fi, or vice versa.
  • Connect to the Internet from a different Wi-Fi or Ethernet network. Your network configuration might not allow the Internet access that macOS Recovery needs.
  • Try again later, because the issue might be temporary.
  • Start up from another disk or volume, if available, or use a bootable installer to reinstall macOS.

If you still need help, please contact Apple Support.