How To Create The Image In Dmg File

/ Comments off

How does one create a DMG of the smallest size for the given folder? I'm referring both to the size of the.dmg file, and to the size of the filesystem when it's later mounted. If I'm compressing a 73MB folder, I'd like both of these to be 73MB + the minimal filesystem overhead. I'd also like the.dmg to be compressed, so that it takes up less. DMG files are a Mac OS X Disk Image files. Like ISO files, DMG files are essentially disk images, which are intended to be used with the Mac operating system. The DMG files normally contain program installation files for Apple system and applications, but they can also be used to hold compressed files. Next step, go to Finder Application Utilities and open macOS Disk Utility App. In the macOS Disk Utility App, go to File New Image Image from Folder. See screenshot below. And then choose the folder of your files and documents that you want to create the DMG file of it.

DMG is used for disk image files on Macintosh computers running Mac OS X. This file extension replaces the older file extension IMG which was discontinued during the release of later series of Mac operating systems. You can create an empty disk image, add data to it, then use it to create disks, CDs, or DVDs. In the Disk Utility app on your Mac, choose File New Image Blank Image. Enter a filename for the disk image, add tags if necessary, then choose where to save it.

Learning how to create a bootable macOS installation disk can be helpful in a variety of situations. Rather than download and install a new OS from Apple's servers each time, it can be used for multiple installations on different machines. It can also help in situations where the operating system is corrupted or installation from app store shows errors.

Nov 03, 2009  I have a short video (not copyrighted) that is a.dmg file after saving it on my hard drive. I need it converted to MP4. Is there a way to do this? I have seen various programs for sale but I won't do this very often and don't want to spend $30. Is there a free one out there that anyone knows of? I appreciate any help. This seems way too. Now you know how to convert to MP4 on Mac! MP4 conversion is just a small part of the features this powerful Movavi software has. Thanks to support for all popular formats, you can use the program to convert MOV, MKV, FLV, M4V, MTS, VOB, WebM, WMV, and AVI to MP4, rip unprotected DVDs, or extract sound tracks into MP3 audio files. Convert dmg to mp4 on mac.

To create a bootable macOS installation disk, you have to burn the DMG file to a USB drive as CD/DVD is not available for Mac computers. Here's how to do it from text commands and using a purpose-built software called WizDMG. You will first need to download the DMG file for the macOS version you wish to install. For example, if you want to create a bootable macOS Mojave installer, you will need the DMG file for macOS Mojave. Once the file has been downloaded to your PC, you can proceed with one of the bootable disk creation methods shown below.

Method 1: How to Create Bootable USB Installer for Mac via Commands

macOS (formly named Mac OS X) is just a variant of popular Unix based operating system. This means a lot of daily and advanced tasks on Mac can be done via text commands such as creating bootable USB installer for Mac. However, this could be a lot of challenges if you had no clue about commands and I suggest taking a look at the other solutions in this post to avoid messing up the computer with the wrong commands.

Step 1. Search macOS name in app store (Mojave, High Serria, EI Capitai). Click 'Get' button to download the installer image on your Mac. The downloaded file will be located in Application folder.

Step 2. When the download is completed, the installation windows opens automatically, just close the window and go to Application folder. You will find a file started Install, such as Install macOS Majave.

Step 3. Now connect an external flash drive with more than 16G free space. And backup the data in that USB drive as the installer erase all content from it. Open Disk Utility app and format the USB drive with APFS or Mac OS Extended.

Step 4. Open the Terminal app and copy-and-past the following commands to make a booatble USB installer from macOS image:
For Majove: sudo /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
For High Serria: sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
For EI Capitan: sudo /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X El Capitan.app

Step 5. Input the admin password when being prompted. And wait for the booatable disk being created. When it is done successfully, you will receive a message shown in above screenshot.

Unconfortable with text commadns and prefer doing it in a simple way? The second suggestion is more user friendly!

Method 2: How to Make Bootable USB from macOS with WizDMG

WizDMG fills a huge gap in Windows not supporting DMG files. It is a desktop utility supporting Windows and Mac. It allows you to directly burn DMG files to disk in order to create a bootable macOS Mojave installer or a boot disk for any macOS version.

WizDMG offers an intuitive interface with no clutter and full functionality to handle DMG files. Apart from burning such disk image files to DVD/CD or USB, it also gives you edit options where you can add and remove files from within the DMG file, rename DMG files and even create DMGs from files and folders on your desktop. This software application has been created for novice users as well as experts. It is easy to use, has a very high burn success rate and will help you create a bootable macOS installer in no time. Follow the instructions below:

Step 1Install WizDMG

Download WizDMG from the official website and install it on your PC. Launch the program and select the 'Burn' option in the main interface.

Step 2Create Bootable USB from macOS Install Image

Click on Load DMG to import the macOS installation file into the application. Insert a USB (16G free space) and click on the 'Burn' button next to the appropriate media type.

The important thing to remember here is that you now know how to create a macOS installer in Windows. There aren't a lot of options out there because of the compatibility issues between Mac and Windows environments. That means converting DMG to ISO and back again to DMG leaves the door open for corrupted files and incorrectly burned bootable media, which defeats the whole purpose because it might not even work in the end.

Method 3: Create macOS High Serria/Mojave Bootable USB on Windows 10/7

Another way to create macoS bootable disk on Windows is using a tool called DMG2IMG along with Windows command prompt. It requires a bit of a workaround, but even novice users can learn to burn a DMG file to a disk to create bootable media for a macOS installation. Just make sure you follow the instructions below carefully.

Step 1. Download DMG2IMG and install it in your Windows PC. Open File Explorer and go to the folder containing the DMG2IMG program, then right-click and select 'Open command windows here.'

Step 2. Type the following command and hit Enter: dmg2img [sourcefile.dmg] [destinationfile.iso]

Step 3. Now that the DMG file has been converted to ISO format, you can use the following command to burn it to a disk. Before that, insert a disk into the optical drive: isoburn.exe /Q E: 'C:UsersUsernameDesktopdestinationfile.iso'

Step 4. This command utilizes the Windows native disk image burner to burn the ISO to the disk in your optical drive. The ISO file can't be used directly in macOS, but it can be mounted as a virtual drive. Once you do this, you can convert it back to DMG using Disk Utility in Mac. You can then use this as your bootable macOS installer.

As you can see, this is a bit of a workaround because DMG files aren't natively supported in Windows. Likewise, ISO files aren't fully supported in macOS. However, you can use this method to create a macOS installation disk in Windows. If you want a much simpler solution, then review the next method shown here.

Summary

If you ask us how to create a bootable macOS installation disk, this is the method we recommend. There's no confusing command line work involved, you don't need a bunch of additional software utilities to get the job done, and the high accuracy of the application ensures that you won't be wasting disk after disk trying to burn the installation media for macOS onto a disk. Use WizDMG as a quick and painless way to create a macOS installation disk in a very short time.

Nov 15, 2018 16:47:20. / Posted by Candie Kates to Mac Solution

Related Articles & Tips

In this blog, we will share two different methods to create a disk image—the first one using macOS Mojave’s Disk Utility and the second using a Mac data recovery application. Read on to know the benefits of one method over the other.

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 Mojave

macOS Mojave’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.

How To Create The Image In Dmg File Windows 10

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

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 Mojave (or later macOS/OSX)

How To Create The Image In Dmg Files

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

How To Create The Image In Dmg File Windows 10

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 Mojave 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.

How To Create The Image In Dmg File Size

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

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

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 Mojave. 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.