I have a MacBook Pro M2 running the latest macOS Sonoma. I am looking for a way to make a Windows 10 bootable USB on my Mac so I can fresh install Windows 10 on my newly built PC for my son. Does anyone know know how to do this? In the past, this could be done easily with the stock Built-in Bootcamp Assistant app but it is not available on Sonoma.

[Update Dec 12] The solution that finally worked is WonderISO app. Here is the online tutorial:

https://www.sysgeeker.com/online-help/wonderiso.html

P.S. Still received notification from this post frequently. I did try the new suggested app but unable to open it, saying 'WinDiskWriter cannot be opened because it is from an unidentified developer.'

I was searching for the best solution for hours, and then even ran into issues within the dated solutions that I saw here. I even tried creating a virtual machine, but my MacBook’s old 4 GB RAM couldn’t handle a Windows 10 VM (to be compatible with the flash drive).

I thought I’d share to save anyone else some trouble, at least for the time being. In my case, I was creating a bootable USB for Windows 11, and only had access to Macs and admin-blocked PCs.

Here are the steps that worked for me (no terminal required!):

1. Download the .iso file for the operating system of your choice from the Microsoft website.

2. Download UNetbootin at https://unetbootin.github.io. It’s safe and has been recommended here before, but as with any software on the internet, look it up yourself first just for the habit if anything.

3. Insert your USB flash drive.

4. Despite what you read elsewhere, you’ll want to reformat your USB from FAT32 to ExFAT. Search your Mac for “Disk Utility” and open it. Then select your flash drive and click “Erase” at the top. Enter a new name for the flash drive and use the dropdown to select “ExFAT”. Click OK.

5. Open the UNetbootin file and try to run it. If there is a security popup, click OK then go into your System Preferences -> Security and select “Open Anyway” next to UNetbootin.

6. Select the “Diskimage” radio button and search for the .iso file you downloaded in step 1. Also select the USB drive you are using. If concerned, you can find its name in the Disk Utility app, but mine was something like “Disk2s1”.

7. Click OK and wait. Could be several minutes loading certain files, so don’t worry - it’s still loading even if it’s not moving.

8. After it’s done, eject and use it to boot your new PC.

Hope this helps anyone else in my situation at least for a while.