MacBook Air (Mid 2013): Black Screen or alert messages when installing Windows 7

Symptoms

When installing Windows 7 using the Boot Camp Assistant on MacBook Air (Mid 2013) computers, the following issues might occur:

• Black screen
• "Press any key to boot to CD or DVD" or "CDBOOT: Couldn't find BOOTMGR" alert messages
• "Setup was unable to create a new system partition or locate an existing system partition."

This occurs when installing Windows 7 from DVD using an external USB?optical drive.

Resolution

To install Windows 7 on a computer that exhibits this behavior, do the following:

1. Press and hold the power button until your computer powers off.
2. Ensure that the optical drive containing the Windows DVD is plugged in to the USB port on the right side when facing the computer.
3. Press the power button to turn the machine on.
4. When the startup tone sounds, press and hold the Option key.
5. When the option appears, select Macintosh HD and click the up arrow to restart in OS X.
6. From the Finder, click the?Go menu and choose?Utilities.
7. Open Boot Camp Assistant and remove the Boot Camp partition. Quit Boot Camp Assistant.
8. Ensure a USB storage drive is connected to the USB port on the left side while facing the computer.
9. Format the USB storage drive using Disk Utility in the Utilities folder:
10. Start the Windows 7 installation over again using Boot Camp Assistant. ?Ensure that the USB storage drive you formatted in the previous step remains in the left USB port until the Windows installation is finished.
11. For instructions on installing Windows see this page. Be sure to enable the checkbox "Download the latest Windows support software from Apple" in the Setup Assistant.

Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple?s recommendation or endorsement. Please contact the vendor for additional information.

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Source: http://support.apple.com/kb/TS4599

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