To install Windows using Boot Camp, you need the following:
A Mac that supports the version of Windows that you want to install. Check the compatibility table to see which versions are compatible with your Mac.
A Microsoft Windows ISO file downloaded from our site.
An Internet connection.
An administrator account in macOS to use Boot Camp Assistant.
A minimum of 2GB of RAM.
30GB of free disk space is recommended if you're installing Windows for the first time; 40GB of free disk space is recommended if you're upgrading from a previous version of Windows.
A 16GB-or-larger USB storage device or drive formatted as MS-DOS (FAT) to install Windows Support software (drivers).
Connect a 16GB-or-larger USB flash drive that you can erase. Leave this flash drive plugged into your Mac until the Windows installation is finished.
Open Boot Camp Assistant from the Utilities folder (or use Spotlight to find it), and click Continue.
3. Select only the options to create a Windows installation disc and to download the latest Windows support software from Apple. Then click Continue.
If your Boot Camp Assistant does not have the first option, follow THIS tutorial:
4. Choose your Windows installation ISO, then click Continue.
5. Boot Camp erases your USB flash drive and prepares it for Windows installation.
5. When you see "Download Support Software for Windows 7," close the Boot Camp Assistant window to quit the app (yes, quit the app).
You're done! Now to the next step: installing drivers onto the USB flash drive. Lets go!