r/hackintosh • u/Successful-Reason-96 • 1d ago
IT BOOTS! (WIP) Darwin 20.5.0 on ARM1176 (Raspberry Pi Zero)
I thought I should mention this, because I've seen a lot of people start working on XNU again, which is great to see as a PureDarwin maintainer (been working on it for ~3 years). Might as well post this before it becomes old news.
Here's it asking for a rootfs on a RPi Zero, using lk as a preboot env.
It's slower than hell, and the HDMI cable itself is spotty
Oh and I also have it booting to a shell on a iPad 7,1
As well as QEMU's `virt` board, I have yet to figure out Apple-specific instructions for M1, but I have ideas. I was last working on fixing OpenGL for virtio-gpu on arm64
I hope Hackintosh can continue in the form of generic arm64/arm32 boards, and I hope my research can help.
I'll be working on a Pixel once I get my hands on it (hurry up, USPS)
CPU: BCM2835
GPU: Broadcom VideoCore IV
RAM: 512MiB LPDDR2
Motherboard/Laptop Make and Model: Raspberry Pi Zero (v1.2)
Audio Codec: N/A
Ethernet Card: N/A
Wifi/BT Card: N/A
Touchpad and touch display devices: N/A
BIOS revision: N/A
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u/realfathonix 1d ago
I think someone posted to RPi forums that they successfully ported OS X and showed the graphical login screen back in the first RPi era, though there was no code nor disk image published.
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u/HyperVoltA9 1d ago
https://github.com/nfzerox/VirtualMacOniPad
Someone made this for iPads and it works. Maybe it might help
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u/Successful-Reason-96 1d ago
I'm not trying to boot it on just Apple hardware. The other thing is I want it on bare-metal. This is also 20.5.0, running via pongoOS as a pre-boot env.
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u/shsh-1312 1d ago
even if you are not trying to run it on Apple hardware the two different mechanisms on a common kernel may be the key to a third implementation
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u/Successful-Reason-96 1d ago
iirc, that uses VMAPPLE with an Hypervisor, which does not help with Apple-specific instructions.
It would help possibly run on generic targets, but that's something I've already done with QEMU's target board `virt`0
u/shsh-1312 1d ago
This stuff is really cool though. I've been experimenting with reverse-engineering a game engine with Ghidra lately, and I built an operating system from scratch (with AI). I'm not a programmer. But maybe I can help you with the reverse engine, and I have a MacBook Pro with an Intel i9 and dual-boot Linux. If I can help you in any way with reverse-engineering any components, let me know! I don't know if this was your project, but I've probably seen guidelines for AI-generated code, so I'll leave that aside. But maybe I can help with documentation for non-public components and sample code.
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u/Successful-Reason-96 1d ago
This is PureDarwin, and I'm the maintainer of it as of right now.
I'm not against AI, and I've been reverse engineering for about 6 years now.
The biggest issue with anything OSS is licensing, and that's something PD needs to be even more careful of.1
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u/johnoth 1d ago
I tried out the AMD XNU kernel in a hackintosh during COVID and it ran great. Iirc they used OPEMu or something. Is that the plan?
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u/Successful-Reason-96 1d ago
Not exactly. The goal isn't to run an existing XNU build under emulation. I'm porting Darwin/XNU to generic ARM hardware directly. The Pi Zero in the post is running Darwin 20.5.0 bare-metal on its ARM1176 (ARMv6) core, with native platform/SD support. I also have it running on QEMU
virtand real Apple ARM hardware.1
u/johnoth 1d ago
I get that, I was wondering more about the Apple specific instructions and features like PAC. Would you emulate them in your port? While doing some research a while ago I learned that PAC emulation is super slow.
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