Practical operation of making win10 boot U disk on Mac system

After uninstalling some software, the win10 system of the old computer had a blue screen problem, restarted cyclically and could not enter the safe mode. I tried other solutions and still could not solve the problem. I had no choice but to reinstall the system. It is a pity that there are several gigabytes in the computer. Study materials.

Making a bootable U disk under the Mac system is different from that of Windows, and it is impossible to use UltraISO to process image files simply and rudely. After consulting related online tutorials and blogs, some possible problems have been ruled out, and finally an article Relatively complete production instructions, please feel free to eat.

Prepare

1. A computer with Mac system

2. A U disk larger than 8G (need to be formatted)

3. Windows 10 image file (you can go to the official website to download, snail speed, or download through magnetic link resources):
MSDN-Make a Quiet Tool Station

4. And the software that plays a role in installation failure: Boot Camp ISO Converter (this software can solve the problem that the size of a single file in a FAT32 format U disk cannot exceed 4GB, regardless of whether it is an iso image file of 1903 or 1909, insta.win are over 4GB in size, so this is the key to solving the failure problem)

Download address: After entering, slide to the bottom of the page and there is a link under Splitting the ISO:
Using larger Windows 10 ISOs with Boot Camp Assistant

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Production steps

1. Insert the USB flash drive and erase (format) the contents of the USB flash drive in Disk Utility.

2. Open Boot Camp ISO Converter, and drag the downloaded iso image file into Boot Camp ISO Converter to repackage. The purpose is to distribute the image file insta.win as a file with a size less than 4GB.

3. With the U disk inserted, open the terminal on the launcher and enter:

diskutil list

At this point, you can see the drive letter of your computer’s built-in hard drive and the drive letter of the USB flash drive you just inserted:

The disk2 shown in the picture is the inserted external USB disk. The specific displayed name can be judged according to the capacity SIZE.

4. Enter the command line to format the U disk (disk2) into FAT32 format:

diskutil eraseDisk FAT32 "WINDOWS10" MBR disk2

WINDOW10 here is the name of the formatted U disk, you can name it yourself, remember, you will need it later.

After entering the command, the terminal will start to enter the process, and finally it will display Finished erase on disk2, which means successful formatting

5. Double-click the mounted image file, enter the command line again in the terminal, and check the iso file name.

diskutil list

At this point, you can see that there is an additional disk3 (disk image) in the disk list, which is the iso image file just mounted:

Remember the type name in disk3 (here is CPBA_X64FRE_ZH-CN_DV9), you need to copy the input command line later

6. Enter the command line and copy the mounted image disk to the U disk (disk2):

cp -rp /Volumes/CPBA_X64FRE_ZH-CN_DV9/* /Volumes/WINDOWS10/

Note here that the image file is processed by Boot Camp ISO Converter, because the insta.win file inside is smaller than 4GB at this time, which meets the format requirements. "CPBA_X64FRE_ZH-CN_DV9" is the type name of disk3 in the previous step, and "windows10" is the name of the U disk formatted in the previous step, which needs to be consistent.

7. Enter the command line in step 4, press Enter, and wait.

You may find that there is no response, but the copying has already started. Here you can right-click your USB flash drive after a period of time > click to display the profile, and you can find that the used space of the USB flash drive is increasing, indicating that the copy is in progress.
It will take about 5-10 minutes to copy the files, depending on the read and write speed of your U disk. When a line of default command appears on the terminal, usually your computer name + your user name, it means that the copy has been completed, and the available space of the U disk will not increase. Be sure to make sure here so as not to end the recording early and cause the file to be incomplete.

8. Pull out the U disk, insert it into the machine where the system needs to be installed, enter the BIOS interface, and set the U disk to boot.

Press F2 to enter the BIOS interface directly after booting (the specific key depends on the machine), set the U disk to start, you can consult to check whether your computer motherboard supports UEFI mode.

9. Install the system according to Win10 boot

Note: In the disk format step, an error may be reported "windows cannot be installed on this disk, the selected disk adopts the GPT/MBR partition format". This prompt pops up because the boot method does not match the hard disk data structure.

Analyze the cause of the failure:

This prompt pops up, mainly because the format of your hard disk is GPT partition table, and the boot mode of your U disk is "Legacy" mode, which leads to the problem caused by the mismatch between the boot mode and the disk data structure!

The correct boot method and disk data structure are as follows:

The legacy boot corresponds to the MBR partition;
the UEFI boot corresponds to the GPT partition;
the following provides two solutions for you, as follows.

Method 1: Boot the USB disk into UEFI mode

We restart the computer and re-select the U disk boot mode, because this prompt indicates that the hard disk is in GPT format, so we need to start the U disk in UEFI mode, that is, we need to select the name of the U disk starting with "UEFI:", so that the installation will not be difficult. It will prompt: "Windows cannot be installed to this disk, the selected disk adopts gpt partition format".

Method 2: Convert the disk format to MBR, but all disk partitions will be cleared

When we receive this error message, do not restart the computer, but directly press the "Shift+F10" key combination on the keyboard, and the CMD command prompt window will pop up.
In the pop-up CMD command prompt window, first enter diskpart, and then enter the commands in sequence, as shown in the figure below.
1. Enter "list disk" and press Enter to confirm; (all disks will be listed, remember the disk number of your hard disk, and you can tell it by the capacity, as shown in the figure below, disk 0 is our hard disk, disk 1 is the U disk)
2. Enter "select disk 0" and press Enter to confirm; (Select disk 0, which is our hard disk, which is the hard disk to be used as the system) 3.
Enter "clean" and press Enter to confirm; ( Clear the disk, which is equivalent to formatting the entire disk)
4. Enter "convert mbr" and press Enter to confirm; (Convert the hard disk to mbr format. If you want to convert the hard disk to gpt, enter "convert gpt")

After successfully converting the selected disk to mbr format, we can install the Win10 system through the Legacy mode boot method (the boot item starting with the U disk is not UEFI)

The above is the general stepping process of making a Windows boot U disk. The following two articles are quoted, and individual pictures are also screenshots of the original author:

https://zhuanlan.zhihu.com/p/273305963
https://zhuanlan.zhihu.com/p/344383888

grateful!