4
You may be able to install Windows with a USB ash drive that contains a Windows ISO image
downloaded from Microsoft. To nd out, open Boot Camp Assistant, click Continue, and see if
the option “Create a Windows 7 or later install disk” is available.
To install Windows with a USB ash drive, you need the following:
•
An ISO image of Windows 7 Home Premium, Windows 7 Professional, Windows 7 Ultimate,
Windows 8, or Windows 8 Pro, downloaded from Microsoft.
•
A USB ash drive that is 8 GB or larger.
Boot Camp Assistant erases the ash drive and copies the Windows ISO and support
software to it.
To see how much free space you need on your Windows partition, refer to the documentation
that came with Windows.
Installation overview
Installing Windows on your Mac involves the following steps:
Step 1: Check for updates
Step 2: Prepare your Mac for Windows
Boot Camp Assistant (in the Other folder in Launchpad) prepares your Mac for Windows by
creating a Windows partition and then starting the Windows installer. Optionally, you can
download the Windows support software and copy a Windows ISO image to a USB ash drive.
Step 3: Install Windows on your Mac
Step 4: Install the Windows support software
Important: Before you begin, make sure you back up important les.
Step 1: Check for updates
Be sure to install all OS X updates rst, so Windows installs successfully.
1 Log in to an administrator account on your Mac, quit all open apps, then log out any other users.
2 Choose Apple menu > Software Update.
Install all available updates. If your Mac restarts after installing an update, choose
Apple menu > Software Update again to install any additional updates.
3 Go to www.apple.com/support/bootcamp to see if you need additional updates.
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