Cant Copy Dmg To Usb

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.

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.

Create macOS High Sierra Bootable USB Installer on Windows 10 Firstly, you need to download macOS High Sierra DMG file from the link below. Also, with the DMG your should the download the TransMac software from the link down below, and for the flash drive, you need 8 GB or higher. First, make sure your USB drive is formatted for use with a Mac, then download the OS X Lion installer from the App Store and copy it to your flash drive. Finally, use your bootable flash drive to install Lion on your Mac.

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

Cant Copy Dmg To Usb Drive

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

How to install dmg file on usb

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

Imagine that you’ve bought the USB flash disk with capacity of 16 GB or external hard disk. Sooner or later you’ll need to transfer files larger than 4 GB, whether it comes to ISO files, backup copies of your operating system, movies, personal video files or other; so when this situation happens, while copying or moving your large files to USB flash disk, the following error may occur: The file is too large for the destination file system. In this article we’ll discuss ways to prepare an USB flash disk or external hard disk and seamlessly transfer large files (greater than 4 GB) to your USB flash disk.

Let’s simulate this situation: I inserted my Transcend USB Flash with 16 GB in my computer, with the Windows 8.1 operating system and the operating system assigned H: drive letter to my USB disk. I double clicked it and put a file in this disk (Creative Blog logo):

On my Desktop, in Transcend folder I have really large file, over 8GB (you can see both Transcend folder and the root folder of my USB disk displayed on the screenshot below), so I dragged that Fil.iso file and dropped it to my USB disk:

Dmg

Cant Copy Dmg To Usb Drive

… but the file is too large:

The first thing you need to check is the file system of your USB disk, whether it is FAT32, to be precise. Default file system format for my Transcend flash device is FAT32, which lacks support for files larger than 4 GB. To be sure what file system you have, right click on your USB flash disk (or hard disk) and select Properties:

There are two ways to fix this:

  • Formatting your USB disk to NTFS file system,
  • Converting FAT32 file system to NTFS without data loss.

How to format USB disk to NTFS file system and avoid file is too large error

If you choose this way it’s mandatory to copy all your files from the USB disk to your PC, because all files on your disk will be deleted. After the format to NTFS is finished, you can copy that files back from PC to USB disk. Follow this procedure to format your disk to NTFS file system: right click on desired disk and select Format:

Select NTFS, Volume label (this is good practice; my label is CREATIVBLOG) is optional and tick Quick Format option (quick format is quite sufficient). When the format finishes, try to transfer large files to your USB disk.

How to convert FAT32 to NTFS without formatting or losing data on USB disk

Yes, this is possible, too: we’ll use convert command in the command prompt to avoid disk formatting and unnecessary copying files to your computer; this is a simple and time effective way to convert FAT32 to NTFS file system.

Open your command prompt; I always start it via Run dialog box – hold this key combination: Win key + R to open Run dialog box:

Cant Copy Dmg To Usb Flash Drive

Enter cmd and confirm with Enter to open the Command Prompt. Enter the convert command in Command Prompt to start the FAT32 to NTFS conversion. It’s important to double check what letter is assigned to your disk (letter H is assigned to my Transcend disk, which I marked with the red rectangle):

Enter the command as follows: Convert H: /FS:NTFS and press Enter. The conversion process will start:

After several minutes the conversion process will finish, and you can now try copying large files to your disk:

This command is supported on Windows XP operating system and above.

Further info regarding FAT32 limitations: http://en.wikipedia.org/wiki/File_Allocation_Table

How to fix
Description

Cant Copy Dmg To Usb Drive Windows

While transfering large files to USB flash disk, the following error may occur: The file is too large for the destination file system. Here is a fix.
Author