Set a partition size that meets your needs, because you can't change its size later. When Boot Camp Assistant asks you to set the size of the Windows partition, remember the minimum storage-space requirements in the previous section. Boot Camp Assistant will use it to create a bootable USB drive for Windows installation. If you're asked to insert a USB drive, plug your USB flash drive into your Mac. Use Boot Camp Assistant to create a Windows partition Open Boot Camp Assistant, which is in the Utilities folder of your Applications folder. After installing Windows, you can use any Secure Boot setting without affecting your ability to start up from Windows. If you changed it to No Security, change it back to Full Security before installing Windows. Check your Secure Boot setting The default Secure Boot setting is Full Security. Install Windows 10 on your Mac for FREE with Boot Camp Assistant 1. After installation, you can use either Windows or Mac OS X on your Mac computer.
Windows is installed on its own partition. Apple Boot Camp Support Software for Mac enables you to install Windows on your Intel-based Mac computer, using a Microsoft Windows install disc that you provide. Download your copy of Windows 10, then let Boot Camp Assistant walk you through the installation steps for Intel-based Macs. Boot Camp is a tool that comes with your Mac and lets you switch between macOS and Windows.