Asahi Linux is closing in on official support for Apple M3 Macs, bringing the reverse-engineered Apple Silicon port to a third hardware generation.

For anyone who has not followed the project: Asahi runs Linux on Apple Silicon hardware with no vendor documentation, no vendor driver code, and no vendor cooperation. Every subsystem, the GPU, display controller, power management, USB, audio, Thunderbolt, has been understood by reading the hardware’s behaviour rather than a datasheet.

That it works at all on M1 and M2 is remarkable. Extending it to M3 is a lot of the same work again, because Apple changes silicon between generations in ways that are invisible from outside and load-bearing from inside.

What M3 support involves

The pattern from previous generations is that a new SoC generation is not a recompile. Each one brings changed register layouts, a revised GPU that needs its driver adapted, altered display and power management interfaces, and new firmware behaviour that has to be characterised before anything can be written against it.

The GPU is consistently the hardest part. Asahi’s OpenGL and Vulkan work by Alyssa Rosenzweig and Asahi Lina produced conformant drivers on earlier hardware, which is an extraordinary result for a clean-room effort, and each new GPU generation restarts a meaningful chunk of it.

The practical situation

Apple Silicon Macs are genuinely good hardware: excellent performance per watt, strong displays, long battery life. The obstacle to using them with Linux has always been that the machines are not documented, so the port lags the hardware by a couple of years.

That lag is the thing to plan around. If you want Linux on a Mac today, the well-supported generations are the ones the project has had time with, and buying the newest model means waiting. M3 approaching official support narrows the gap without closing it, since M4 and later remain ahead of the work.

The other consideration is that this depends on a small number of people doing extraordinarily difficult work, largely on community funding. The project has been through public friction about sustainability and maintainer capacity, and that context has not gone away.

Worth being clear about

Asahi is not a Mac compatibility layer or a virtual machine. It is Linux running natively on the bare hardware, with an upstream-first policy: the work goes into the mainline kernel and Mesa rather than being held in a vendor tree. Apple Silicon support that exists in mainline today is largely because of this project.

Whatever you think about Apple’s hardware or its openness, the engineering here is among the most impressive reverse-engineering work happening in Linux, and it is why a machine that ships with a locked-down operating system can run a free one at all.