WinDiskWriter

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About WinDiskWriter

WinDiskWriter is an open-source macOS app for creating bootable USB Windows installers that support both UEFI and Legacy BIOS boot modes. It allows users to install Windows on a PC, Intel Mac, or certain virtual machines from a single universal USB drive. Notable features include patching the Windows 11 installer to bypass TPM, Secure Boot, and minimum RAM requirements, adding EFI boot support to Windows Vista and 7 (which don't support it natively), and automatically splitting large install.wim files to fit FAT32's 4GB file size limit. WinDiskWriter supports Windows images from Vista through Windows 11 in both x64 and x32 architectures, and runs on macOS versions from Snow Leopard 10.6 through the latest Tahoe 26.0, on both Intel and Apple Silicon. The app is written in Objective-C and relies on wimlib for WIM file manipulation and optionally grub4dos for Legacy BIOS support.

Key Features

• Create bootable USB Windows installers from macOS
• Supports both UEFI and Legacy BIOS boot modes
• Patch Windows 11 installer to bypass TPM, RAM, and Secure Boot checks
• Add EFI boot support to Windows Vista and Windows 7
• Automatic splitting of large install.wim files for FAT32 compatibility
• Supports Windows Vista through Windows 11, x64 and x32
• Runs on macOS Snow Leopard 10.6 through Tahoe 26.0
• Native support for Intel and Apple Silicon Macs
• Uses wimlib for WIM file manipulation
• Optional grub4dos bootloader for Legacy BIOS support
• Written in Objective-C for broad macOS compatibility
• GPL-3.0 licensed open-source project

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