Depending on your Mac model, you may need a 16 GB or larger USB flash drive to create a bootable installer.
Always back up your important files before partitioning your hard drive. 2. Download the Windows ISO File how to download boot camp
Because Boot Camp Assistant comes pre-installed on macOS, you do not actually "download" the primary software; instead, you use it to download necessary drivers and partition your disk. Before starting, ensure your Mac supports Boot Camp. Depending on your Mac model, you may need
How to Download Boot Camp and Install Windows on Your Mac Boot Camp is a built-in utility for Intel-based Macs that allows you to install and run Microsoft Windows alongside macOS. Unlike virtualization software, Boot Camp lets Windows run directly on your Mac’s hardware, providing maximum performance for gaming and resource-heavy applications. Download the Windows ISO File Because Boot Camp
Install Windows on your newer Mac using Boot Camp - Apple Support
You need at least 64 GB of free space, though Apple recommends 128 GB or more for the best experience.
You must have an official Windows disk image (ISO) to begin.