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Zasom's avatar
Zasom
Iron Contributor
Jun 16, 2025

Please help me install Windows 10 on Mac safely?

Read a couple of posts and watched several videos about installing Windows 10 on Mac without Bootcamp app. Up to now, the task was not done yet. The Mac does not to recognize the bootable USB during ...
Catherinem's avatar
Catherinem
Iron Contributor
Jun 16, 2025

To install Windows 10 on Mac, the first step is to make a Windows 10 bootable USB. You can do this on a Windows PC or Mac. Below is a free way to do that.

1. Plug in the USB drive. Open Terminal (Applications > Utilities > Terminal). Run:

diskutil list

Locate your USB (e.g., /dev/disk2).

2. Unmount (But Do Not Eject) the USB: 

diskutil unmountDisk /dev/diskX

(Replace X with your disk number, e.g., disk2)

3. Format the USB as exFAT.

diskutil eraseDisk MS-DOS "WIN10" MBR /dev/diskX

4. Write the Windows ISO to USB.

sudo dd if=~/Downloads/Win10_22H2_English_x64.iso of=/dev/diskX bs=1m

Replace Win10_22H2_English_x64.iso with your ISO filename.

bs=1m = Block size (speeds up the process).

This takes 5-20 minutes to (no progress bar—be patient!).

Once you have the USB, reboot the Mac and hold the option key. After that, select the USB and start installing Windows 10 on Mac from USB. 

Note: You should back up the important files before installation.

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