• Boot Camp For Mac
• High Sierra Boot Camp Windows 7

I can't install Windows 10 using Bootcamp Assistant on macOS High Sierra. Bootcamp Assistant creates the install media, I partition the disk using the built in.

After installing Microsoft Windows on your Mac with Boot Camp, use Startup Manager to switch between Windows and macOS.

Boot Camp For Mac

How to switch between Windows and macOS

1. Restart your Mac, then immediately press and hold the Option (or Alt) ⌥ key on your keyboard during startup.
   If you're currently using macOS, you can restart by choosing Apple menu  > Restart. If you're currently using Windows, you can click the Start button, then click the Power icon and choose Restart.
2. Release the Option key when you see the Startup Manager window:
   
3. Select your macOS or Windows (Boot Camp) startup disk, then click the arrow under its icon, or press Return.
   

High Sierra Boot Camp Windows 7

Repeat these steps any time you need to switch between operating systems.

Learn more

• If you use VoiceOver or another screen reader and you need help switching between Windows and macOS, please contact Apple Support.
• If you choose ”Restart in OS X” from the Boot Camp menu in Windows, you might see the message ”Could not locate the OS X boot volume.” Use the steps above to switch to the Mac operating system.