Finally, make sure your Mac model can support Windows 10 in Boot Camp- check this list to find out. You'll also need a USB flash drive (4GB or larger) and a Windows 10 ISO disk image, which you can download here from Microsoft, and a valid Windows 10 license. We recommend at least 30GB for each, but the more space you have, the better.
Before you start, make sure you have enough space on your hard drive for both Windows and Mac.