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  1. #1

    Member Since
    Aug 06, 2017
    I can't partition my disk
    Hi! I'm sorry if I can't be understood, I'm not a native english speaker

    I want to install Windows 8 on my mac. I tried partitioning my disk but I can't because of the following problem:

    I tried turning my computer off and quitting every app and it still won't work.
    I'm not a tech genius so I really can't see what is that I'm doing wrong.

    Thank you!

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    Late 2013 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, High Sierra
    Welcome to our forums.

    1. You can not perform operations on your disk while using it. The disk is still mounted (see the message above about the boot helper). You must boot to Recovery first.

    2. You can not arbitrarily partition your disk for Windows 8. You must use the Boot Camp Assistant which can be found in "Applications, Utilities".

    Please do some research on how to install Windows using Boot Camp. And check to make sure that your Mac can run Windows 8. Late model Macs can not run Windows 7, 8, or 8.1, they can only run Windows 10. You didn't tell us which Mac you have or what version of macOS it's running.

    (Your English is good.)

  3. #3

    ferrarr's Avatar
    Member Since
    May 21, 2012
    Pawtucket, RI, USA
    L2014 Mac mini macOS 10.13, iPhone 6 iOS 11, iPad Pro 1 12.9" iOS 11,  Pencil 1
    Here's Apples' Support Article dealing with Windows and Bootcamp.
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

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