If the file has been downloaded to a Windows PC, you will need to make sure the USB flash drive is formatted in FAT32 - a format that both the Windows PC and the Mac computer can both read. Most USB flash drives already use this format, but if yours doesn't you can quickly format it in Windows.
If your Mac suddenly refuses to boot up properly, you might need bootable macOS install USB to make repairs. But how do you create such a disk if all you're left with is a Windows 10 computer? Fortunately, there's a great tool that you can use for free to create bootable macOS media on a USB drive in a Windows 10 environment. This article shows you how to download a macOS DMG file, format a USB drive using a GUID Partition Table, burn the DMG to the drive and boot your Mac from the USB. All the steps except the last one are done on a Windows 10 machine.
Part 1: Download macOS or Mac OS X DMG File
Step 1: Download the DMG file and then convert it to ISO using a free online conversion service like YouConvertIt. Step 2: Once you do this, you can use another utility like ISO Editor to burn the ISO file to a USB drive. Remember, even if you convert the DMG to ISO. Burning an ISO image to a USB drive will erase everything on the drive! Before continuing, check that the USB drive is empty or that you have backed up any files you want to keep. From the Device drop-down at the top of the Rufus program screen, choose the USB storage device you want to burn the ISO file to. Now, insert an USB drive into the computer. Then UUByte program will detect the device in a minute and you can find it in drop-down menu. Next, click 'Browse' button to add an ISO file from the local drive to the program. Step 3: Start Burning ISO File to USB Drive. Select the USB name and click 'Burn' button at the bottom to start the ISO. Burn an ISO or DMG to Removable Media; Burn an ISO or DMG to Removable Media - Mac; Burn an ISO or DMG to Removable Media - Windows; Save Windows to USB For Use on a Mac; Run GradPrep; Stuck In Windows After Grad Prep. Make sure you have a blank disk or USB drive as all data on the removable media will be erased. Mar 23, 2018 All previous comments restored. In this easy tutorial you will learn how to create a bootable dvd or usb pendrive from a DMG file under Windows 7 to 10. Download TransMac as a zip or executable.
The first step is to get the DMG disk image file for the version of macOS that you want. You can get a copy of the latest macOS version from Apple download portal or App Store here. There are also several other direct download sites that offer various versions of Mac OS X in DMG format rather than the standard APP format that runs on Mac. Since you're working in a Windows environment, you need the DMG rather than the APP file.
Part 2: Format USB Drive to GPT
Mostly, the USB drive was formmated to FAT32 in default when being shipped out from the factory. However, FAT32 can be only used for installing OS with legacy BISO, which doesn't work for macOS. So the next step is to format your USB drive in the GPT partition style in order to burn installation files to the desired USB drive. You can do this in Command Prompt as admin. In elevated Command Prompt (Ctrl+Shift+Enter), input the following series of commands followed by Enter after each line:
Diskpart
List disk
Select Disk X (X stands for the USB drive name that appears after the previous command)
Clean
Convert GPT
Create partition primary
Part 3: Create Bootable macOS USB from Windows 10
You have now formatted the partition of USB drive. It's time to download TransMac for Windows. Although this is a premium software, you can use the initial free trial period to create a bootable macOS USB drive on Windows 10. After installing the application, follow the sequence of steps shown below:
Step 1: Right-click the icon and select Run as Administrator from the contextual menu. Choose Run when prompted.
Step 2: Insert your formatted USB drive, and you will be able to see it in the TransMac software on the left panel.
How To Burn Dmg File To Usb Drive On Windows 8
Step 3: Right-click the USB and select Restore with Disk Image in the contextual menu. Click Yes in the warning popup.
Step 4: You will see a window that says Restore Disk Image to Drive. Here, select your DMG file in the dropdown menu and click OK.
Depending on the system configuration, this can take anywhere from a few minutes to a couple of hours. Once the progress bar is at 100%, a bootable USB is ready.
Part 4: Boot macOS Install USB on Mac
Now remove the USB drive and insert it into the Mac computer. To boot from the disk, you need to hold down the option key when you hear the boot chime. This will take you to the Startup Disk Manager, where you should be able to see the USB drive. It might have a different name, but as long as it is bootable, you'll be able to see it there. Once you select it, the computer will boot from the disk and the macOS installation will begin.
Conclusion:
How To Burn Dmg File To Usb Drive On Windows 10
The whole process might look a bit complicated if this is your first time, but just follow the instructions in this article and you should be fine. That being said, you need to be careful when downloading the DMG file and formatting your USB drive. If you don't do these two steps correctly, the output drive from the TransMac software won't be bootable, which means you can't install macOS using it, and you may need to do the whole thing over again.
Comments are closed.