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A developer writing as Rairii reports that classic Mac OS has reached the desktop on Nintendo Wii hardware, with Mac OS 7.6 and 9.2.2 shown booting. The project remains an early, unreleased port; the report describes extensive firmware and memory-layout work, but does not establish full hardware support or a public release date.
A hobbyist developer has brought classic Mac OS to the desktop on a Nintendo Wii, reporting that versions 7.6 and 9.2.2 have booted on the console. The work is an early port, not a public release: the developer, writing as Rairii on VirtuallyFun, said it is still far from ready for others to use.
Rairii described reaching the desktop as a milestone in a project targeting PowerPC systems built around Nintendo’s ArtX-derived chipsets. The stated hardware scope includes the GameCube and Wii, with the Wii U a possible later target. The report’s images identify Mac OS 7.6 and Mac OS 9.2.2 as having booted, though it does not provide a full compatibility list or demonstrate everyday use of the operating system.
The port begins with Open Firmware-based boot code known as the New World Trampoline. Rairii said the project required porting OpenBIOS and changing assumptions in the Mac boot process about physical memory, memory-mapped hardware and address mappings. The developer also adapted code for a display driver and storage devices attached through the consoles’ EXI bus, including an SD-card adapter and an IDE device.
For initial testing, the Mac OS ROM file was placed on a FAT-formatted storage device for OpenBIOS to load. Rairii said the current storage approach is not a final choice and noted that FAT32’s 4 GB file limit could constrain larger disk images needed by later Mac OS versions. One test driver, the developer cautioned, reflects inaccurate emulation in a personal Dolphin emulator build rather than real hardware behavior.
Classic Mac OS Meets Nintendo Hardware
The report is a notable example of cross-platform PowerPC reverse engineering: software written for Apple computers is being adapted to a console with related processor architecture but different firmware, memory organization and peripheral hardware. Reaching the desktop indicates that the boot process and enough of the platform-specific setup are working to start the operating system’s graphical environment.
That milestone is narrower than a claim that the Wii can function as a complete Mac. The post does not show how much of the hardware works, whether applications run reliably, or how performance compares with an original PowerPC Mac. For readers interested in retro computing, the project’s immediate value is the technical account of the barriers involved, rather than a ready-to-use way to run Mac OS on a console.
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A Project Begun in 2025
Rairii said the project began on June 22, 2025, when they forked OpenBIOS. The developer framed it as a personal effort to learn and experiment, following earlier work porting Windows NT to PowerPC hardware and the Wii. The Mac OS port also draws on work by another developer, Goldfish64, who had made an OpenBIOS port while working on a separate Mac OS X project for the Wii; Rairii said some drivers could be reused, but the overall project was designed to include GameCube support too.
The target systems share a PowerPC lineage but are not interchangeable with Apple hardware. Rairii’s account focuses on adapting the bootloader and memory map to Nintendo systems, including differences in how RAM and memory-mapped I/O are laid out. Those changes help explain why a successful boot requires more than copying Mac OS files onto a console.
“I reached the desktop for the first time.”
— Rairii, guest post on VirtuallyFun
Support Beyond the Desktop
The report does not specify which Wii or GameCube models were tested, whether both displayed Mac OS versions reached the desktop on physical hardware, or which components are functional after boot. It also gives no details on stability, audio, networking, graphics acceleration, application compatibility or input-device support. These capabilities should not be assumed from the desktop images alone.
Public availability is also unresolved. Rairii explicitly said the project is not ready for release and did not announce a timeline. Some of the reported testing uses an emulated EXI-IDE device that the developer says does not accurately match real hardware, so its results cannot by themselves confirm support for that device on an actual console.
Further Porting and Hardware Tests
Rairii said the post would discuss additional challenges encountered during the port, but did not announce a next release, testing date or defined milestone. The next evidence to watch for is a fuller account of which patches and drivers work on real hardware, alongside information about storage and support for the targeted console generations.
Until the developer publishes those details or makes the code available, the project should be treated as an early technical demonstration. A public build and a clearer compatibility report would establish whether the desktop milestone can be turned into a usable port.
Key Questions
What happened with Mac OS and the Wii?
Developer Rairii reported that a port of classic Mac OS reached the desktop on Nintendo Wii hardware, with Mac OS 7.6 and 9.2.2 identified in the report.
Can the public download the port?
Not based on the report. Rairii said the work is nowhere near ready for public release and gave no release date.
Does the desktop milestone mean the Wii works like a Mac?
No. The post does not establish broad hardware support, stable operation or compatibility with Mac applications. Reaching the desktop confirms a boot milestone, not a complete Mac experience.
Which Nintendo systems are part of the project?
Rairii said the project targets the GameCube and Wii, with the Wii U described as a possible future target. The report does not provide a complete list of tested models.
When did development begin?
Rairii said work began on June 22, 2025, when the developer forked OpenBIOS. The desktop milestone was reported on October 29, 2026.
Source: virtuallyfun.com
