"Your bootable usb drive could not be created" - Boot Camp Error

A shot in the dark:

What file system (Mac OS Extended ; NTFS ; FAT32/MS-DOS) and what partition scheme (GPT or MBR) is used for both the USB-Stick and the ext. HD ?

Stefan

I have the same error on a brand new Macbook Air.

File system on USB is FAT32

I think I just got it working. Make sure that you are trying to load the correct iso file. Boot Camp assistant will default to loading the first iso file that may the worong file - in my case that was the iso file for MS Office. Once I had a big enough USB it no longer gets the error. I dont know if it will fully work as it is still loading the files on the drive but I no longer the above error.

I know this thread is old and this reply is probably of no use to the OP now but I've been having several issues putting Windows 7 on my 2010 MacBook Air. After amending the Info.plist file to contain my boot ROM and model ID as mentioned by several users on these forums (https://discussions.apple.com/thread/3435734?start=15&tstart=0) I also hit the "Your bootable USB drive could not be created error". A very simple solution: make sure the ISO file is not mounted when running the Boot Camp Assistant!

Brilliant, Stephen, thank you. The boot camp team should hire you to write error messages, because they're clearly not up to the task.

Stephen thank you! it worked for me!

Stephen,

How do you un-mount the ISO file?

Disregard. I figured out how to un-mount and it looks like it's working.

how to unmount the file?

how did you unmount the file?

To unmount the ISO, you can do so by right/option-clicking the ISO in the Disk Utility, and 'Ejecting'

EDIT: Unmount would be clicking the Windows 7 below (the one that's tabbed over), right-clicking, and 'Unmounting'

Stephen,

I get the error "Your bootable USB drive could not be created" because "An error occurred while copying the Windows installation files." This happens even after I unmount the Windows 7 ISO.

I do have the Windows support software on a 2nd USB drive (not sure if it's bootable or if that should matter?), so I only selected "Create a Windows 7 Install Disk" and "Install Windows 7."

Am I doing something wrong? How do I fix this?

Thanks!

thanx stephen. It was as simpel as that.

Apple shoud do something about their error messages indeed.

thnx

I read all the posts and I unmounted my drives but the error still occur!!??

Can anyone shed some lights on the issue?

Does anyone have the same problem? This is so frustrating!

Has anyone figured this out yet? I have tried switching flashdrives, unmounting, ect. please help!!

Has anyone figured this out yet? I have tried switching flashdrives, unmounting, ect. please help!!