utmapp/UTM
UTM is a cross-platform virtualization application for iOS, macOS, and visionOS that manages and runs virtual machines using QEMU and Apple Virtualization backends. The system provides comprehensive configuration, display, and input handling for virtual machines, including remote management and CLI automation. It features extensive internationalization, supporting over a dozen languages with full UI and error message localization. The architecture has been modernized to use SwiftUI, modular components, and robust build scripts for multi-platform deployment.
48.5
Weak · 1 August 2026
49k
lines of production code
Swift
primary language
1
bus factor · 114 authors in all
3
measurements over time
How it got here
2019–2020 · SwiftUI migration and platform modernization
This period was defined by a comprehensive architectural overhaul, migrating the codebase from Objective-C and Storyboards to a modern Swift and SwiftUI foundation. The work focused on rebuilding the configuration backend, implementing new platform-specific features for iOS and macOS, and establishing robust build and packaging scripts for cross-platform support.
24 changes
2021–2022 · internationalization and automation
This period focused on expanding global accessibility by adding comprehensive localization for multiple new languages, including French, German, Spanish, Polish, Finnish, and others, alongside refactoring the macOS launcher and configuration systems. The team also introduced new automation capabilities, specifically a command-line interface (utmctl) and an AppleScripting interface, to enhance programmatic control over virtual machines.
44 changes
2023–2025 · internationalization and remote management
This period focused on expanding global accessibility by adding full localization support for multiple new languages, including Arabic, Italian, Polish, Korean, and various Chinese variants. Simultaneously, the codebase introduced significant backend capabilities for remote VM management and Apple's App Intents for Siri and Shortcuts integration.
23 changes
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About this page
- The description of this project is derived from its own commit history, not from its README.
- The score is its highest published measurement, taken on 1 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
- Measured at commit fb61bfe86a — the exact code this score is about.
- Scored under rubric rubric-2026.08.18. Score the same commit under that rubric and you get the same number.