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2011 iMac won't install Windows 7 in Boot Camp

4523 Views 6 Replies Latest reply: Jun 29, 2013 5:01 AM by Emma Whan RSS
dillonfromphiladelphia Calculating status...
Currently Being Moderated
May 20, 2011 1:36 PM

I'm attempting to install Windows 7 x64 on my 2011 (Thunderbolt) iMac via a burned, bootable DVD which was previously used to install Windows 7 x64 on my friend's MacBook Pro. Apparently, the disc works. After partitioning one of my internal drives in Boot Camp, downloading the drivers and stuff Apple provided, putting that stuff on a FAT-formated flash drive, then attempting to install Windows, the install fails. Well, it doesn't really fail. Before I'm even given the option of installing, right after clicking the "start setup" button in the Windows Installer, I get an error saying "No device drivers were found. Make sure that the installation media contains the correct drivers, and then click ok." I go to scan and browse the flash drive for the drivers which Apple provided, and I get the same message over and over again regardless of what I click. I ran Software Update before doing any of this, and I have also attempted to install the x32 version of Windows 7 as well, as to no avail. I would try burning the Apple-provided drivers and stuff to a CD or DVD, but obviously there is no way to insert such a disc into the drive since the Windows disc is already in.


These are my computer's specs, if they matter:


2011 Thunderbolt iMac

2TB storage, partitioning 100GB for Windows

3.4GHz i7 quad-core


Radeon 6970 with 2GB VRAM

...attempting to install Windows 7 Home Premium (I think) x64 (or x32 if I have to)

iMac, Mac OS X (10.6.7)
  • corpclik Calculating status...

    I am having the same exact problem,  my specs are:


    2011 Thunderbolt

    i7 3.4

    27" imac



  • Trancedog73 Calculating status...

    I believe Windows 7 needs a partition formatted as NTSF (it won't run on a FAT 16/32 formatted drive). As BootCamp doesn't do NTSF formatting, you can run the Windows 7 installer to achieve that from the Windows 7 Install Disk. Just be sure you select the partition that is open, and not your Mac OSX one.


    Here's some links that might help you out ...



    Message was edited by: Trancedog73

  • emarde Calculating status...



    Were you ever able to resolve this issue? I am currently in the same shoes as you were and I need to get Windows on my iMac (2TB space) pronto. Do you have a recommendation?



  • Doc.Occam Calculating status...
    Currently Being Moderated
    Aug 1, 2012 5:28 AM (in response to emarde)

    Same problem. iMac, 2TB, "Boot Failed!" Tried several partition sizes, multiple installs. Has anyone figured this out?

  • Emma Whan Calculating status...

    I had a similar problem.  I installed boot camp on my late 2012 iMac using a windows 7 DVD in an external usb drive.  Windows seemed to install successfully, but after trying to reboot into windows I got the command line screen with "Boot failed. Press any key to enter command line." 


    The solution is as follows:


    1.Boot with the windows 7 install DVD (hold down option at startup and then select the windows DVD)

    2. Pretend you are about to install windows, but when you get to the screen where you select a partition, press shift f10. This will bring up a window where you can enter commands.

    3. Type bootrec.exe/fixMbr [enter]

    4. Type bootrec.exe/fixBoot [enter].


    Exit and reboot and this time you should be able to boot from your windows partition.


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