WindoWriter

Spec sheet

Purpose

WindoWriter turns Windows 10/11 or older ISO files into UEFI bootable USB installers.Read 11 Oct 2026 · github.com

Support

The project welcomes issues and pull requests on GitHub.Read 11 Oct 2026 · github.com

License

The repository identifies its license as MIT.Read 11 Oct 2026 · github.com

Additional dependencies

Large images on macOS require wimlib, while Linux requires parted, dosfstools, and wimtools for large images; Windows ESD images also require wimlib.Read 11 Oct 2026 · github.com

Boot limits

Legacy BIOS boot and Windows 11 requirement-bypass patching are listed as roadmap items, not current features.Read 11 Oct 2026 · github.com

Boot support

The project says its USB installers boot on UEFI machines and support Secure Boot; legacy BIOS support is listed on the roadmap.Read 11 Oct 2026 · github.com

Custom drivers

Users can add custom INF-based driver folders with the --driver option.Read 11 Oct 2026 · github.com

Dependencies

Large images require wimlib on macOS and Linux; Windows uses DISM for WIM splitting, while ESD-based Windows ISOs also need wimlib.Read 11 Oct 2026 · github.com

Disk safeguards

It refuses to write to the boot disk, refuses internal disks unless explicitly allowed, and requires confirmation before erasing a drive.Read 11 Oct 2026 · github.com

Driver provisioning

The --intel-rst option downloads Intel RST/VMD drivers at write time and adds them to the USB; custom INF driver folders are also supported.Read 11 Oct 2026 · github.com

Image formats

It supports ESD images, pre-split SWM media, and splitting oversized WIM files into FAT32-sized parts.Read 11 Oct 2026 · github.com

Intel storage drivers

The --intel-rst option downloads Intel RST/VMD drivers at write time and places them on the USB for Windows Setup.Read 11 Oct 2026 · github.com

Intended use

The project describes its CLI as suitable for scripts and automation as well as terminal users.Read 11 Oct 2026 · github.com

Interface

It provides a macOS GUI and a command line interface across macOS, Linux, and Windows.Read 11 Oct 2026 · github.com

Interfaces

It provides a SwiftUI GUI on macOS and a command-line interface on macOS, Linux, and Windows.Read 11 Oct 2026 · github.com

Platform limits

The GUI is currently macOS-only; Linux and Windows use the CLI, and native GUIs for those platforms are on the roadmap.Read 11 Oct 2026 · github.com

Requirements

Writing on Linux requires root access and Windows requires an elevated prompt; macOS requires version 13 or newer.Read 11 Oct 2026 · github.com

Safety checks

It checks prerequisites before formatting, refuses to write to the boot disk, and requires confirmation before erasing a drive.Read 11 Oct 2026 · github.com

Secure Boot

The project says the resulting USB installer boots with Secure Boot because it uses Microsoft's boot files and writes no third-party bootloader.Read 11 Oct 2026 · github.com

Write verification

After copying, it checks file sizes and SHA-256 hashes for boot-critical files, with an option to verify every file.Read 11 Oct 2026 · github.com

Where Specifiction places it

• Bootable USB Software#35 of 386.9