Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I was wondering if you know of a way of creating a Windows 7 USB installation disk on Mac OS.

share|improve this question
    
I am using the dd command to copy the .iso image of the installation disk to the usb drive. It's taking so long! Over 40 minutes now. –  Alex B. Apr 21 '10 at 0:13
    
Yeah the sudo dd command works, seems your usb drive is slow. But for me it took around 35-40 minutes. so no point in suprising –  Mohan Gajula Apr 19 '11 at 5:04

2 Answers 2

Here are the steps to be performed on Mac to create a Windows 7 USB Bootable Installation Drive.

Steps:

  1. Open a Terminal (under Utilities)

  2. Run diskutil list and determine the device node assigned to your flash media (e.g. /dev/disk2)

  3. Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2)

  4. Execute sudo dd if=/path/to/downloaded.iso of=/dev/diskN bs=1m (replace /path/to/downloaded.iso with the path where the image file is located; for example, ./windows7.iso)

  5. Run diskutil eject /dev/diskN and remove your flash media when the command completes (this can take a few hours on slower drives)

(Note: The sudo dd command executes for around 40minutes, depends on the USB port and drive)

share|improve this answer

If you have access to a different Windows box, try the tool from Microsoft here. There are also manual instructions here. I don't know of any way of making a windows-bootable drive natively in Mac OS X.

I've recently been through this. No matter what I did, I couldn't get my MacBook Pro (can't remember exactly how old it is, but it identifies as "MacBook Pro 3,1") to boot a Windows install disk off anything except the internal SuperDrive, which unfortunately is broken. I tried more things than I can remember, including external DVD drive, USB key, USB hard drive, Firewire hard drive, EFI bootloaders, etc etc etc.

In the end I managed a hack using a trial version of Parallels Desktop - instructions here. If you have a different model Mac to mine, you might find rEFIt helpful - it's an EFI loader that you can run either from your hard drive or a USB key that should hopefully make the experience of booting into the windows install a bit easier...

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.