Open-source alternatives to MacOS Simple KVM

Cloud Hypervisor is a Rust-based hypervisor and KVM virtual machine monitor designed to execute 64-bit guest operating systems. It functions as a user-space virtual machine manager that employs a minimal emulation layer to reduce memory overhead and latency for cloud workloads. The project distinguishes itself through the use of a memory-safe language to implement a virtio device emulator and a user-space device model. It provides a standardized web API for managing virtual machine lifecycles and resource configurations. The platform covers broad virtualization capabilities, including the em

This project is a comprehensive technical manual for installing macOS on non-Apple x86 hardware using the OpenCore bootloader. It serves as a configuration guide for emulating Apple hardware and patching system firmware to achieve operating system compatibility on PCs. The documentation provides detailed instructions for SMBIOS hardware emulation, including the generation of system identifiers and model profiles. It covers the application of ACPI table patches to enable native power management and the modification of UEFI runtime services to resolve memory map and write protection issues. Th

Unlocker is a patching tool designed to enable the installation and booting of macOS guest operating systems on non-Apple hardware. It functions as a macOS guest enabler by modifying virtualization software binaries to bypass hardware restrictions and support OS combinations that are not supported by default. The project provides a mechanism to emulate Apple-specific device signatures by intercepting calls between the virtual machine manager and the hardware. It also includes a driver image provider that delivers ISO images containing the necessary utilities and drivers for guest installation

xhyve is a macOS virtual machine manager and virtualization tool that leverages the native hypervisor framework to run guest operating systems in userspace. It provides a virtualization layer for executing guest systems with hardware acceleration. The project features a hardware pass-through hypervisor that maps physical host devices directly to guest virtual machines to increase performance. It includes a remote framebuffer server and VNC access to enable interaction with the guest display and input devices from external devices. The tool covers virtual hardware emulation for storage, netwo

Auto-unlocker is a collection of utilities designed to modify virtualization software libraries to bypass system restrictions on guest operating systems. It primarily functions as a binary patcher that enables the selection and booting of macOS guests within VMware. The project modifies core system libraries to unlock hidden operating system selection options and bypass boot checks for unsupported guests. It also includes a guest tools installer that downloads and applies the driver packages necessary for hardware integration and performance. The toolset provides capabilities for managing vi

ievms is a tool that automates the provisioning of Internet Explorer virtual machines in VirtualBox, enabling cross-browser compatibility testing across multiple IE versions on a single host. It downloads and configures Microsoft's official IE virtual machine images into separate VirtualBox VMs using a single command-line script, handling the entire setup process from image acquisition to guest configuration. The project distinguishes itself through several automation features that streamline the testing workflow. It installs VirtualBox Guest Additions and configures guest control, allowing p

Docker-Android runs a full Android emulator inside a Docker container, enabling mobile app testing and automation without requiring a physical device. The emulator uses QEMU-based virtualization with optional KVM acceleration for hardware-backed performance, and supports nested virtualization on cloud VMs from providers like AWS, GCP, and Azure for environments without direct hardware acceleration. The container exposes the Android Debug Bridge over TCP/IP, allowing host-side tools to connect to the emulator as if it were a local device. It provides browser-based interaction with the emulator

Winapps is a virtualization bridge that allows Windows applications to run on a Linux desktop as if they were native. It uses the Remote Desktop Protocol to stream individual application windows from a background virtual machine or remote server, avoiding the need for a full virtual machine window. The system identifies installed software by scanning the guest registry to automatically generate native desktop shortcuts and icons. It integrates these applications into the local desktop environment, including the mapping of executables to desktop entries and the configuration of file manager co

Harvester is a hyperconverged infrastructure software platform that combines compute, storage, and networking into a single system for managing virtualized environments on bare metal servers. It functions as a virtualization management platform and KVM hypervisor manager, providing a centralized interface to orchestrate the full lifecycle of virtual machines. The project distinguishes itself by integrating Longhorn distributed block storage to provide redundant, software-defined storage and a bare metal provisioning tool for automated deployment. This allows for the orchestration of infrastru

Hyperlight is an embedded virtual machine manager designed to execute guest binaries within hardware-isolated code sandboxes. It utilizes a KVM micro-VM manager to run untrusted third-party code, enforcing strict memory boundaries to prevent unauthorized host access. The project features a guest-host function bridge that facilitates bidirectional communication and a state snapshot tool for saving and restoring the memory state of a sandbox to reduce startup latency. The system includes a toolchain for guest binary cross-compilation and mechanisms for managing resource constraints, such as fi

Incus is a unified orchestration platform for managing system containers, OCI application containers, and virtual machines through a single control plane. It brings together cluster infrastructure management, secure multi-tenancy, software-defined networking, and pluggable storage backend orchestration into one cohesive system exposed via a full REST API and command-line interface. What distinguishes Incus is its ability to run multiple instance types side by side—full Linux system containers, OCI application containers, and QEMU virtual machines—all managed with consistent tooling. Networkin

microvm.nix is a declarative virtual machine manager and orchestrator for defining, building, and managing isolated guest environments using Nix. It functions as a virtual machine image builder that transforms system specifications into bootable disk images and runner scripts. The project provides a hypervisor abstraction layer, enabling the deployment of guest images across multiple virtualization backends through a unified configuration. It includes specialized tools for PCI hardware passthrough, granting virtual machines direct access to physical host USB and PCI devices. The framework co

OrbStack is a native macOS application that replaces Docker Desktop, providing an all-in-one environment for running Docker containers, full Linux virtual machines, and local Kubernetes clusters. It runs Linux VMs directly on the macOS hypervisor framework for near-native performance, uses VirtioFS for fast bidirectional file sharing between macOS and Linux, and leverages Rosetta for near-native x86 emulation on Apple Silicon. The system assigns predictable local domain names to containers and VMs with automatic HTTPS certificate generation, forwards ports via event-driven updates, and stores

PureDarwin is a macOS application that serves as a unified virtual machine manager for running Darwin-based operating systems. It wraps QEMU system emulator processes with a native macOS interface built using Apple's SwiftUI framework, allowing users to launch and manage multiple virtual machines from a single application window. The application is configuration-driven, starting virtual machines from user-defined JSON or plist files that specify disk images and hardware parameters. Each virtual machine runs as a separate QEMU child process with independent memory and CPU allocation, and multi

rkt is a pod-native container engine and runtime for Linux that executes containerized applications as isolated pods. It serves as an OCI container runtime and a Linux container manager, supporting the execution of images based on Open Container Initiative, appc, and Docker specifications. The project distinguishes itself by offering hardware-level container isolation, allowing pods to run within virtual machines using KVM or QEMU for a dedicated kernel. It further separates itself through secure container deployment practices, utilizing SELinux mandatory access control and TPM-backed integri

Tart is an Apple Silicon virtualization manager used to build and run macOS and Linux virtual machines using native hardware virtualization frameworks. It functions as a virtual machine cluster orchestrator and an ephemeral runner for executing continuous integration pipeline steps within isolated, short-lived environments. The system utilizes an OCI-compatible virtual machine registry to push and pull images via standardized container registries. It features a controller-worker architecture that schedules virtual machine lifecycles across remote worker nodes, incorporating a secure SSH jump

gibMacOS is a Python-based suite of utilities used to fetch official macOS installation files and recovery components directly from Apple servers. Its primary purpose is to download system images and assemble them into bootable recovery USB drives. The tool specifically enables the creation of macOS recovery media from a Windows environment. It achieves this by using disk imaging and compression tools to flash the retrieved system components onto external USB storage. The project manages its own environment by automating the resolution and installation of required Python dependencies at runt

OSV is a unikernel operating system and cloud-native execution environment designed to run as a secure microVM on hypervisors such as KVM, Firecracker, Xen, and VMware. It functions as a Linux binary compatible runtime, allowing unmodified Linux binaries to be executed as secure microVMs without requiring recompilation. The project distinguishes itself through its ability to package applications into minimal bootable images and its provide of a virtual machine management API. This REST interface enables remote monitoring of system health, management of execution traces, and control over guest

Boot2Docker is a minimal Linux distribution that boots entirely from RAM to turn any machine into a Docker host. It is delivered as a bootable ISO image that can be written to SD cards, USB sticks, or hard disks, starting Docker containers in about five seconds without requiring a full operating system installation. The system is preconfigured for use as a VirtualBox virtual machine, with persistent disk mounting that automatically stores Docker images, containers, volumes, and SSH keys across restarts. It supports host-to-container file sharing through VirtualBox Guest Additions integration,

TigerVNC is a remote desktop software system consisting of a server and client implementation. It enables the streaming of graphical desktop environments across different operating systems by implementing the RFB protocol to exchange pixel data and input events. The software provides secure remote access through password authentication and the use of cryptographic certificates to verify remote server identities. It facilitates remote system management by capturing a local display on a server and forwarding it to a viewer application for remote control. The system includes capabilities for di