Windows 8 and 8.1 Forums


Missing Operating System message while booting

  1. #11


    Posts : 1,875
    Windows 10 Pro Prieview x64


    Oh well. Does you mac have a superdrive? It doesn't let you make the bootable USB in that case - only a DVD. If so you could burn the ISO to a DVD that would be the easiest.

    I'm not sure about manually creating the disk in OSX. Your PC isn't seeing the USB as bootable so you could perhaps try formatting it as MBR before doing the dd in your link. In disk utility create one FAT32 partition then click on options and "master boot record". You might also need to set the partition as active which you can do with gparted.

    Click image for larger version

    If that doesn't work I'd install Windows 10 in a VM and then use Rufus (or borrow someone else's PC if that is possible).

      My System SpecsSystem Spec

  2. #12


    I don't have a disk.
    I want to use the usb option.
    I tried this method (Enable "Create a Windows USB Install Disk" in Bootcamp Assistant for Mountain Lion - Apple - Atomic ) but when I add a 7th item the Boot Camp Assistant refuses to load and crashes.
      My System SpecsSystem Spec

  3. #13


    This method (https://www.youtube.com/watch?v=VBAQ3CNgfxc) worked.
    I am now burning the windows 10 technical preview iso to a usb stick....
    I'll let you know if I will be able to use it to install windows 10 tech preview to my sony vaio van-fw21z.
      My System SpecsSystem Spec

  4. #14


    Posts : 1,875
    Windows 10 Pro Prieview x64


    You have mavericks? You'll need to re-sign the program as you've changed the plist according to comments in here burgua • Create bootable Windows 7 USB Stick using Bootcamp...

    You need to make a self-signed code signing certificate in keychain access and then use codesign command to sign the changed bootcamp assistant application bundle.

    There are details of how to do that here How to re-sign Apple's applications once they've been modified - MacNN Forums - it is much easier than it looks - only takes a couple of minutes.
      My System SpecsSystem Spec

  5. #15


    Posts : 1,875
    Windows 10 Pro Prieview x64


    Quote Originally Posted by skiabox View Post
    This method (https://www.youtube.com/watch?v=VBAQ3CNgfxc) worked.
    I am now burning the windows 10 technical preview iso to a usb stick....
    I'll let you know if I will be able to use it to install windows 10 tech preview to my sony vaio van-fw21z.
    Good news - do give us an update. It it will boot it will work. You should look into Windows 10 Forums also.
      My System SpecsSystem Spec

  6. #16


    It is still writing!
      My System SpecsSystem Spec

  7. #17


    Now I am getting only a blinking cursor on my sony vaio....
      My System SpecsSystem Spec

  8. #18


    Posts : 1,875
    Windows 10 Pro Prieview x64


    unplug any other usbs
      My System SpecsSystem Spec

  9. #19


    By the way, my Macbook Pro operating system is Yosemite.
      My System SpecsSystem Spec

  10. #20


    Quote Originally Posted by adamf View Post
    unplug any other usbs
    I just tried it because I had a usb mouse connector on but the problem remains.
      My System SpecsSystem Spec

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Missing Operating System message while booting
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