How to Install Windows 10 on Your iMac Running macOS

Installing Windows 10 on your iMac running macOS requires a specific approach, known as hybrid partitioning. This process is necessary when you want to install both operating systems on your device. Here's a step-by-step guide on how to do it.

Firstly, it's essential to create a partition for Windows on your internal drive. The accepted answer in an Ask Different question provides a method for installing Windows 10 without using the Boot Camp Assistant or an optical drive. This method was tested on an iMac12,1 with Windows 10 version 21H1.

For a clean install of Windows 10 version 21H1, you don't need to upgrade from a previous version. The Windows drivers provided by Apple work best when Windows is installed to BIOS boot. Attempting to install Windows in UEFI mode on an iMac12,1 can result in either complete failure or partial loss of hardware use.

To start the installation process, you'll need a USB flash drive containing the Boot Camp Support Software or Windows Support Software. The Boot Camp Assistant is designed to use a Windows installation DVD to install Windows on your Mac model. Once installed, you should be able to upgrade to Windows 10 version 21H1. Note that the Boot Camp Assistant can only be used to install 64-bit BIOS booting Windows 7 through Windows 8.1.

By following these steps, you'll be able to successfully install Windows 10 on your iMac running macOS. Make sure to carefully follow the instructions and take necessary precautions to avoid any issues during the installation process.

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