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1. Create Bootable Disk Image Mac Disk Utility
2. Create Bootable Usb Mac Disk Utility
3. Create Bootable Usb Using Disk Utility Mac

Disk Utility User Guide

Partitioning a disk divides it into individual sections known as containers.

1. Type the select disk command followed the number assigned for the USB flash drive (e.g., select disk 4), and press Enter. This command will select the disc partition of your choice. This command will select the disc partition of your choice.
2. Make a Bootable Mac OS X 10.7 Lion Installer from a USB Flash Drive The first article was written with Leopard in mind and does advocate the use of SuperDuper, much as you've done. With that said, one of the comments notes that you need to partition your USB thumbstick with a GUID partition table, and, while not stated, I would certainly use.
3. After downloading the ISO file, you'll need to use Boot Camp Assistant to move it to a bootable USB drive. Insert a USB flash drive to your Mac. Make sure it's at least 8GB, which is usually marked.

However, with APFS, you shouldn’t partition your disk in most cases. Instead, create multiple APFS volumes within a single partition. With the flexible space management provided by APFS, you can even install another version of macOS on an APFS volume.

Important: If you’re partitioning your internal physical disk because you want to install Windows, use Boot Camp Assistant instead. Do not use Disk Utility to remove a partition that was created using Boot Camp Assistant. Instead, use Boot Camp Assistant to remove the partition from your Mac.

Add a partition

How to create a bootable macOS Big Sur installer drive Put the macOS Big Sur installer on an external USB thumb drive or hard drive and use it to install the operating system on a Mac. In the Disk Utility app on your Mac, choose View Show All Devices, then select the container you want to erase in the sidebar. If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon. Click the Erase button in the toolbar.

Important: As a precaution, it’s best to back up your data before creating new partitions on your device.

1. In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button in the toolbar.

   If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

   If you have multiple storage devices connected to your Mac, make sure you select a volume that’s on the device you want to partition.

   When you select a volume that already has data on it, the pie chart shows a shaded area representing the amount of data on the volume and an unshaded area representing the amount of free space available for another volume. Disk Utility also shows whether the volume can be removed or resized.

   Note: If you see a small volume with an asterisk, the partition is smaller than can be represented at the correct scale in the chart.

2. Read the information in the Apple File System Space Sharing dialog, then click Partition.

3. Click the Add button below the pie chart.

4. Type a name for the volume in the Name field.

   For MS-DOS (FAT) and ExFAT volumes, the maximum length for the volume name is 11 characters.

5. Click the Format pop-up menu, then choose a file system format.

6. Enter the size or drag the resize control to increase or decrease the size of the volume.

7. Click Apply.

8. Read the information in the Partition Device dialog, then click Partition.

9. After the operation finishes, click Done.

After you partition a storage device, an icon for each volume appears in both the Disk Utility sidebar and the Finder sidebar.

Delete a partition

WARNING: When you delete a partition, all the data on it is erased. Be sure to back up your data before you begin.

1. In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button in the toolbar.

   If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

2. In the Apple File System Space Sharing dialog, click Partition.

3. In the pie chart, click the partition you want to delete, then click the Delete button .

   If the Delete button is dimmed, you can’t delete the selected partition.

4. Click Apply.

5. Read the information in the Partition Device dialog, then click Partition.

6. After the operation finishes, click Done.

Erase a partition

1. In the Disk Utility app on your Mac, choose View > Show All Devices, then select the container you want to erase in the sidebar.

   If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

2. Click the Erase button in the toolbar.

   If the Erase button is dimmed, you can’t erase the selected container.

3. Type a name for the volume in the Name field.

4. Click the Format pop-up menu, then choose a file system format.

5. After the operation finishes, click Done.

Enlarge a partition on a storage device

If you have multiple partitions on a device and one of them is running out of space, you may be able to enlarge it without losing any of the files on it.

To enlarge a volume, you must delete the volume that comes after it on the device, then move the end point of the volume you want to enlarge into the freed space. You can’t enlarge the last volume on a device.

WARNING: When you delete a volume or partition, all the data on it is erased. Be sure to back up your data before you begin.

1. In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button .

   If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

2. In the Apple File System Space Sharing dialog, click Partition.

3. In the pie chart, select the partition you want to delete, then click the Delete button .

   If the Delete button is dimmed, you can’t delete the selected partition.

4. Click Apply.

5. Read the information in the Partition Device dialog, then click Partition.

6. After the operation finishes, click Done.

Many times you want to install Windows 10 on a Mac computer with the intention of running your favorite windows games, applications which don’t have a version for Mac OS, or solve some Windows issue especially for boot-related issues. Regardless of the causes, you need to first create a Windows 10 bootable USB from ISO on Mac OS. As a Mac users, you might know that Apple provides an custom-tailored solution called Bootcamp to help create a Windows bootable USB. But in fact, creating Windows bootable USB on Mac isn’t as straightforward as you think, in the creating process, naturally there will be a variety of problems.

We've also received lots of emails from readers asking why Bootcamp wouldn’t allow me to use Windows 10, despite the fact that my laptop is compatible. BootCamp doesn't always work well, especially in creating Windows 10 bootable USB installation media, the most common errors you will encounter: 'failed to load BOOTMGR' or 'not Enough Space'. Another reason is Apple has already stripped the ability to make Windows 10 bootable USB in last release of Mac OS, and it is a problem because that require uses other tools. It’s believed that each software has its own pros and cons, Boot Camp is no exception. But it’s still a outstanding tool which is developed by Apple, so, this article will give priority to Boot Camp and also shows 4 intuitive approach to help you make a Windows 10 bootable USB on mac with or without Boot Cam Assistant.

Method #1: Create A Bootable Windows 10/8/7 USB on Mac with Bootcamp

Create Bootable Disk Image Mac Disk Utility

As a dual-boot booting tool, Boot Camp Assistant is highly regarded in the field of creating Windows 7/8/10 bootable USB since it was released, it provides the ability to download drivers, re-partition, and add new partition on your Mac. But sometimes you will find bootcamp tool doesn't allow any customization of the process. Before using it, you need to know that your USB installation media will be formatted as FAT32 file system, which can’t store files larger than 4 GB. Let’s see how it works.

Step 1. First of all, make sure you’ve download a Windows 10, or Win7, 8 ISO image file on your Mac computer. Then you need to move ISO file to your USB drive by using Boot Cam.

Step 2. Now, insert your USB dive with at least 8GB to your Mac computer, make sure you’ve created a copy for your important file because your USB will be formatted.

Step 3. Launch the Boot Cam Assistant from Utilities, then check the two options: Create a Windows installation disk and Install Windows 7 or later version. Click Continue to proceed.

Step 4. when you go to this step, Boot Cam Assistant will detect and locate your ISO image file, click choose button to find and import the right one, and click continue. It may take some times to format your USB, please wait.

Step 5. When the process is complete, you will see that your USB drive will be renamed as WINNSTALL, this is your windows 10 bootable USB tool! Click Quit to close the app and then Eject the USB drive.

That's it! You’ve successfully made a bootable USB drive with Windows 10 OS, and you can use it to configure new Windows 10 PCs from scratch.

Method #2: Create A Bootable Windows 10 USB On Mac with WonderISO

Making a bootable USB is not as easy as copying ISO file to your USB drive,it requires professional ISO writing tool to burn it to USB drive instead of copying. For Mac users, There may have many chance to encounter some unknown errors when using Bootcamp to create a Windows 10 USB disk on Mac, like Bootcamp failed to load bootmgr, not recognizing iso or usb not enough space,etc. So you desperately need to find a way to create bootable USB without Bootcamp.

Fortunately, PassCue for ISO is a wonderful tool which can burn, create, edit and extract ISO files from any files, folders and operating system files. It has been adopted on a large scale by various users and widely recommended. It provides 5 key functions for your ISO operations including: Burn ISO, Extract ISO, Edit ISO, Create ISO and copy disc, it works very effectively in both Windows and Mac OS.

Step 1. Get the software downloaded from above button and install it on your Mac with proper step instructions. Launch the tool with admin privileges to enable every kind of possible authorities. Once the tool screen turns up, you should see there are five functions including Burn, Extract, Cretae, Edit and Copy Disc. To make a Windows 10 bootable USB, then you need to choose the first option “Burn” and next.

Step 2. As you can see, you’re allowed to create a Windows 10 bootable disk with USB drive or DVD/CD, here, just insert your USB drive to your Mac, then import ISO file by clicking browse button. Select your file format from the 'System File' section as FAT, FAT 32, NTFS.

Step 3. In the partition style, it provide two mode to choose based on your ISO file: MBR or UEFI. If MBR won’t boot, then change UEFI mode to create again. When all settings are complete, click Burn button to begin, it will take 5 - 10 minutes to complete the burning process.

Step 4. When the burning is complete, you can open your USB drive and see there are many boot files inside it. Take out of your USB drive and try to install Windows OS on your other computers.

As you can see, this method is so easy and safe! Never damages your ISO file. If you don’t find the method satisfactory and have plans to try out a different approach, you are most welcome to do so.

Part 3 : Create A Windows 10 Bootable USB on Mac without Bootcamp

As we mentioned above, creating a bootable USB Windows 7/8/10 on mac OS isn’t as simple as you might think. You will need Terminal tool on Mac to perform some command. Before we start make sure you have an effective ISO file and have USB flash drive with not less than 4GB capacity. Here are the steps to be performed on a Mac to create a Windows 10 USB Bootable Installation Drive on mac.

Step 1. Connect your USB drive to your Mac.

Step 2. Open a Terminal (under Utilities)

Step 3. Now you need to Run diskutil list and confirm the device node assigned to your USB flash media disk2.

Step 4. Type the following command.

hdiutil convert -format UDRW -o ~/path/to/windows-10-iso.img ~/path/to/windows-10-iso.iso

Step 5. Replace /path/to/downloaded.iso with the path to where the image file is located; for example, ./windows10.iso). This command will convert the ISO file to IMG format.

Step 6. Type the following command to check the location of your USB drive:

diskutil list

Step 7. Next, you need to type the command to Unmount the USB drive, then replace /dev/diskX with the location of your USB drive.

diskutil unmountDisk /dev/diskX

Step 8. Finally, run the following command to create Windows 10/8/7 bootable USB on Mac.

sudo dd if=/path/to/windows-10-iso.img of=/dev/rdiskX bs=1m

Step 9 . Then try to replace /path/to/windows-10-iso with the real filepath of the ISO file and /dev/diskX with the location of the USB drive. This command will take some time, and once it’s complete, you can eject the USB drive by this command: diskutil eject /dev/diskX

Once the process is complete, you can see the data will be copied and your USB will be bootable.

Part 4 : Create Bootable USB Windows 10 on Mac with UNetbootin

UNetbootin is free software and the latest release of new features in UNetbootin focuses on cross-platform technology that allows you create bootable Live USB drives for Ubuntu, Fedora, and other Linux distributions without a CD. It can run on Mac, Windows and Linux. Now, I will show a detailed tutorial.

Step 1. Like other method 1, you can also need to check the path name of the USB drive. After you insert your USB to your Mac, open the Disk utility on Mac OS X, select the USB drive from the left panel and click Info button. Write down the USB name info for the next usage.

Step 2. Now, you need to download UNetbootin tool then install it on your Mac, launch it. And copy the app to the /Application folder. Select the Diskimage button and import your ISO image file.

Create Bootable Usb Mac Disk Utility

Step 3. In the panel, select the USB drive in the Type option, and select your USB drive on UNetbootin. Click on the OK button and wait to the process end!

In my opintion, It’s easy to use and doesn’t damages your system. But there still some users reported that UNetbootin is not working. Good luck to you!

Create Bootable Usb Using Disk Utility Mac