5
Step 2: Prepare your Mac for Windows
Boot Camp Assistant helps prepare your Mac for Windows by creating a new partition for
Windows 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.
Important: If you’re using a portable computer, connect the power adapter before continuing.
1 Open Boot Camp Assistant, located in the Other folder in Launchpad.
2 Select the option to install Windows, select other options you need, then click Continue.
Here are the other options you can choose:
•
If you want to install Windows from a USB ash drive and you have a Windows ISO image,
select the option to copy the image to a USB ash drive. If this option isn’t available, your
Mac doesn’t support installing Windows from a USB ash drive.
•
If you haven’t already downloaded the Windows support software for your Mac, select the
option to download it. In a later step, you’ll install the Windows support software on your
Windows partition.
3 Follow the onscreen instructions for the options you selected.
4 When you’re asked to create a Windows partition, specify a partition size.
If you need help determining the best size for your Windows partition, refer to your Windows
installer documentation. For Windows 8, create a partition that is at least 30 GB.
In a later step, you’ll format the Windows partition.
5 Insert the installation disc for the 64-bit version of Windows into your Mac’s optical drive or
external optical drive, or insert the USB ash drive with the 64-bit version of Windows into a USB
port on your Mac.
6 Click Install.
Boot Camp Assistant creates the Windows partition, restarts your Mac, and opens the
Windows installer.
If you have problems creating a partition
If you have problems creating a Windows partition, check the following:
•
The disk on your Mac must be a single partition, formatted as Mac OS Extended (Journaled). If
the disk already has more than one partition, you must repartition it.
•
The disk on your Mac must be an internal disk. You cannot use Boot Camp Assistant to install
Windows on an external disk.
•
If you have a Mac Pro with more than one internal disk and you want to install
Boot Camp on a disk that isn’t in the rst hard drive bay, remove the drives in the lower-
numbered bays. You can reinstall the drives after you install Boot Camp.
•
If a dialog appears saying “The disk cannot be partitioned because verication failed,” try
repairing the disk using Disk Utility and opening Boot Camp Assistant again. If that doesn’t
work, back up all the information on your Mac, then reinstall OS X. For more information, click
the Finder icon in the Dock, choose Help > Help Center, and search for “reinstall OS X.”
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