Browse free open source Operating Systems and projects for Mac below. Use the toggles on the left to filter open source Operating Systems by OS, license, language, programming language, and project status.

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  • 1
    openFyde

    openFyde

    openFyde supported hardware "x86 PC with Intel HD graphics

    overlay-amd64-openfyde is the official overlay repository for the amd64 (x86_64) build of openFyde, a Chromium OS-based distribution tailored for developers, power users, and alternative devices outside of Google's supported ChromeOS hardware. openFyde offers a fast, secure, and web-centric desktop experience with support for Linux apps, Android containers, and cloud integration. This overlay includes the custom configurations and firmware patches necessary to optimize openFyde for generic x86_64 devices such as laptops and desktops.
    Downloads: 85 This Week
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  • 2
    SerenityOS

    SerenityOS

    The Serenity Operating System

    SerenityOS is an open source Unix-like operating system project with its own custom kernel, graphical user interface, system libraries, and userland tools. It combines a nostalgic “90s UI aesthetic” with modern system capabilities: a preemptive, multi-threaded kernel, own browsers, network stack, file systems, IPC, security features, and a suite of graphical / developer applications. The project is both a hobbyist OS and a polished engineering sandbox.
    Downloads: 33 This Week
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  • 3
    Aura Operating System

    Aura Operating System

    AuraOS, the Franco-English Operating System developed in C#

    Aura Operating System is a GUI-based, object-oriented operating system written in C#. It is designed to showcase how high-level languages like C# can be used to create low-level systems such as kernels, user interfaces, and file systems. Aura features a colorful, windowed graphical desktop environment with built-in applications, all running on a custom kernel built from scratch. It is not based on Linux or Windows, but rather developed as an independent system with its own structure and drivers.
    Downloads: 11 This Week
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  • 4
    Chromium OS Raspberry Pi

    Chromium OS Raspberry Pi

    Build your Chromium OS for Raspberry Pi 4B

    Build your Chromium OS for Raspberry Pi 4B, Pi400, and the latest Raspberry Pi 5. We get it, it's confusing. There are Chromium OS for Raspberry Pi, openFyde that happens to boot on Raspberry Pi, and FydeOS for You - Raspberry Pi 400, these are different releases. This project is about Chromium OS for Raspberry Pi, not FydeOS for You - Raspberry Pi 400, also not openFyde. This project aims to only ship vanilla Chromium OS developed by Google and the Chromium Authors, ported to the world's favorite single-board computer - the Raspberry Pi platform.
    Downloads: 7 This Week
    Last Update:
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  • 5
    Freeloader Linux

    Freeloader Linux

    Freeloader Linux is a live bootable distro

    Freeloader is a live Linux distribution to reclaim your PC and privacy. No hard disk required (boot from DVD/USB)
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    Downloads: 147 This Week
    Last Update:
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  • 6
    Mac OS X 10.4 UTM release

    Mac OS X 10.4 UTM release

    OS X 10.4 tiger build. for UTM App.

    OS X 10.4 tiger build. for UTM App. to use Mac OS X 10.4 Tiger to feel nostalgic, and learn about apple old UI UX, features and documentation form of vintage/ obsolete software Operating system
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    Downloads: 96 This Week
    Last Update:
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  • 7
    Cosmos

    Cosmos

    Cosmos is an operating system "construction kit"

    Cosmos is an operating system "construction kit" made for Visual Studio 2022. Build your own OS using managed languages such as C#, VB.NET, and more! Cosmos (C# Open Source Managed Operating System) is an operating system development kit that uses Visual Studio as its development environment. Despite C# in the name any .NET-based language can be used including VB.NET, Fortran, Delphi Prism, IronPython, F# and more. Cosmos itself and the kernel routines are primarily written in C#, and thus the Cosmos name. Cosmos is not an operating system in the traditional sense, but instead, it is an "Operating System Development Kit". Cosmos lets you create operating systems just as Visual Studio and C# normally let you create applications. Most users can write and boot their own operating system in just a few minutes, all using Visual Studio.
    Downloads: 2 This Week
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  • 8
    DiscoBSD

    DiscoBSD

    2.11BSD-based Unix-like OS for STM32 and PIC32 Microcontrollers

    Discobsd is an experimental UNIX-like operating system derived from 4.4BSD-Lite2, focused on simplicity, transparency, and education. It strips away non-essential features and complexity to present a cleaner codebase suitable for study and hacking. Discobsd preserves the classic UNIX environment while allowing room for modern experimentation, such as porting to alternative platforms or introducing new subsystems. It is valuable for those interested in historical BSD systems, teaching OS design, or creating minimal POSIX environments.
    Downloads: 1 This Week
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  • 9
    DruidBSD is a FreeBSD micro-distribution that supports CD/DVD, USB, and HD booting into a Live BSD Distribution.
    Downloads: 3 This Week
    Last Update:
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  • 10
    HelenOS

    HelenOS

    A microkernel-based multiserver operating system written from scratch.

    HelenOS is a portable microkernel-based multiserver operating system written from scratch. It decomposes key operating system functionality such as file systems, networking, device drivers and graphical user interface into a collection of fine-grained user space components that interact with each other via message passing. A failure or crash of one component does not directly harm others. HelenOS is therefore flexible, modular, extensible, fault tolerant and easy to understand. HelenOS does not aim to be a clone of any existing operating system and trades compatibility with legacy APIs for cleaner design. Most of HelenOS components have been made to order specifically for HelenOS so that its essential parts can stay free of adaptation layers, glue code, franken-components and the maintenance burden incurred by them.
    Downloads: 5 This Week
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  • 11
    Portable Linux

    Portable Linux

    Portable Ubuntu Linux for Scientific Computing

    Released August 22, 2013 Lubuntu Blends: Biochemistry 13.04 (Raring) v5.44 Linux Kernel Image 3.8.0-29 Lubuntu Blends are pre-installed Wubi disk image remixes of Ubuntu and Debian Science meta packages, A custom boot loader allows installations to be copied and automatically booted from most external or USB flash drives. Once up and running, use earlier Lubuntu Remix README instructions here until documentation is updated. https://sourceforge.net/projects/portable-linux/files/ Installation 1. Download the Wubi installer http://releases.ubuntu.com/saucy/wubi.exe 2. Install any flavor of Ubuntu. 3. Swap out the root.disk with the ones provided here. Overview LAMP stack running on localhost (127.0.0.1). Scientific, productivity & media packages include R (Rattle Data Miner), GridEngine, Condor, cooperative computing tools, WINE, LibreOffice, Evolution, Clinica, Neuro Debian Desktop, PsycoPy, OpenVibe, 3DSlicer, Paraview, Openshot. Cheers, Gregory Remington
    Downloads: 2 This Week
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  • 12
    Text based Linux Distribution for Servers/Workstations with easy to use web based server management.
    Downloads: 0 This Week
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  • 13
    6vm
    Project 6vm is attempted to provide a virtual machine based software solution to bring a local network to the ipv6 world, with as minimal cost and efforts as possible.
    Downloads: 0 This Week
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  • 14
    Artica For Samba Appliance

    Artica For Samba Appliance

    NAS/File Sharing/PDC server in 5 Minutes

    Artica For Samba Appliance is an Open source ISO based on Debian 6 that create a full NAS/File server using LDAP system with all necessaries features. It install Artica Web administration Console, a sexy Ajax interface to help you create shares and other filesystem tunes & tweaks
    Downloads: 0 This Week
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  • 15

    Blackbeard Linux

    A linux distro based on Arch for programmers and hackers

    Downloads: 0 This Week
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  • 16

    BoneOS

    Barebone linux os build environement

    BoneOS is *not* a linux distro but a build enviroment setup to build a linux based appliance mainly targeted at embedded world and low power/memory platforms. BoneOS is based on T2 linux SDE and share it's initial code base with mon0wall, askoziapbx, teebx.
    Downloads: 0 This Week
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  • 17
    Cadaz GNU/Linux is an operating system designed for PHP developers who always work while mobile. With Cadaz, you can carry not just your work but entire development including OS, complete server stack and development tools on a flash drive.
    Downloads: 0 This Week
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  • 18
    The goal of FruityOS is binary compatibility with Mac OS X, reimplementing core Apple technology in a manner that is free and open. Towards that end, several open source projects will be combined, e.g., GNUstep, Cocotron, and Darwin OS.
    Downloads: 0 This Week
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  • 19
    Infodomestic Objects
    Infodomestic Objects - This is a set of distribution software that mutate the environment providing and advanced interaction experience. We will use a mixed POSIX/Linux/BSD based platform to develop and distribute our interaction experience improvement.
    Downloads: 0 This Week
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  • 20
    Mac Linux USB Loader

    Mac Linux USB Loader

    Tool allowing you to put a Linux distro on a USB drive.

    This is the Mac Linux USB Loader, a tool allowing you to take an ISO of a Linux distribution and make it boot using EFI. It requires a single USB drive formatted as FAT with at least 2 GB free recommended. The application is available in English and is partially translated into Spanish and Traditional Chinese. The tool is necessary to make certain Linux distributions boot that do not have EFI booting support. Many distributions are adding this with the release of Windows 8, but it has not been finalized and is still nonstandard by most distros.
    Downloads: 0 This Week
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  • 21
    NuttX

    NuttX

    Real-Time Embedded Operating System

    Nuttx is a real time embedded operating system (RTOS). Its goals are: (1) small footprint usable in deeply embedded, resource constrained environments, (2) fully scalable from tiny (8-bit) to moderate (32-bit), (3) standards compliance, (4) real time, and (5) totally open. Think "Tiny Linux". NuttX is now and Apache project in incubation. See https://nuttx.apache.org/download/ for the latest downloads.
    Downloads: 0 This Week
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  • 22
    Unix-like operating system for the TI-89 and TI-92+ graphing calculators.
    Downloads: 0 This Week
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  • 23
    RelaxBSD is a LiveCD in Traditional/Simple Chinese which is based on FreeBSD. It's also very easy to install into your hard disk and you can use it as a desktop OS.
    Downloads: 0 This Week
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  • 24
    Sunflower Sysadmin Toolkit Live CD
    Sunflower Sysadmin Toolkit Live CD(SST) is a Live CD for system administrators to rescue, maintain, and troubleshoot production systems. SST can help sysadmins recover disks data, monitor system and network performance, upgrade firmware, etc..
    Downloads: 0 This Week
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  • 25
    XSystem Kernel Project - an object-oriented 32-bit protected-mode operating system for IA32-architecture.
    Downloads: 0 This Week
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