Fixing Etcher Failed Windows USB | Generated by AI

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Question: Etcher is stuck while flashing Windows 11 ISO on Mac. How to recover and create the USB?

Answer:

Since you are flashing:

Win11_25H2_English_x64_v2.iso

Etcher hanging is expected behavior sometimes because Windows ISO is not a proper disk image for Etcher. It may stay at:

Do not wait too long. Stop it.

1. Quit Etcher

Press:

Cmd + Q

If it does not close:

killall balenaEtcher

or:

pkill -f balena

2. Reset the USB

Find your USB:

diskutil list

Example:

/dev/disk2 (external, physical)

Unmount:

diskutil unmountDisk /dev/disk2

Erase:

diskutil eraseDisk MS-DOS WIN11 GPT /dev/disk2

Now the USB is clean.

3. Use the correct Windows USB creation method

For Windows ISO on Mac, use wimlib.

Install:

brew install wimlib

Mount ISO:

Double click:

Win11_25H2_English_x64_v2.iso

Check:

ls /Volumes

You will see something like:

/Volumes/CCCOMA_X64FRE_EN-US_DV9

4. Copy files

Assume USB is:

/Volumes/WIN11

Copy:

cp -av /Volumes/CCCOMA_X64FRE_EN-US_DV9/* /Volumes/WIN11/

If you get:

File too large
install.wim

remove it:

rm /Volumes/WIN11/sources/install.wim

Then split:

wimlib-imagex split \
/Volumes/CCCOMA_X64FRE_EN-US_DV9/sources/install.wim \
/Volumes/WIN11/sources/install.swm \
3800

5. Boot Lenovo Xiaoxin

Insert USB.

Power on:

F12

Choose:

UEFI USB

Windows installer should start.

Why Etcher failed

Etcher expects:

disk image
 |
 +-- GPT
 +-- EFI partition
 +-- filesystem

Example:

Ubuntu.iso
      |
      +-- partition table
      +-- bootloader

Windows ISO:

Windows.iso
      |
      +-- DVD filesystem
      +-- setup files
      +-- install.wim

Different structure.

So for Windows:

Mac
 |
 | wimlib
 v
FAT32 GPT USB
 |
 v
Lenovo UEFI boot
 |
 v
Windows Setup

is the reliable path.

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