vmix.nix/flake.nix
Git Sagar 242e48a5fc macOS Tahoe VM images (OpenCore/QEMU), Apple-ID compatible, VNC
Add a macOS image pipeline mirroring the Windows one: unattended install,
generalization and user creation, driven end to end in QEMU on a KVM host.

lib/images/macos:
- makeOpenCore: OSX-KVM OpenCore ESP with a config.plist rewritten per image —
  SMBIOS model + serial/MLB (macserial) + UUID + ROM=en0 MAC (built-in NIC pinned
  to PciRoot(0x0)/Pci(0x12,0x0)) for Apple ID / iMessage / App Store; boot disk;
  OpenCore self-entry hidden. ident.nix derives MAC+UUID from a seed so the NixOS
  module and CLI know the NIC MAC at eval time.
- makeImage: one QEMU session driven by vm-driver.py (QMP + screenshot settle
  detection + OCR of the menu bar) — boots the recovery via OpenCore, opens
  Terminal (Ctrl-F2 -> Utilities -> Terminal), types the bootstrap command;
  vmix-install.sh erases the disk as APFS, lays down the host-extracted installer
  app skeleton + a byte-exact SharedSupport.dmg (raw disk mapped to that byte range
  of the pkg, dd'd in — Recovery's xar truncates an 18 GB member), runs
  startosinstall with the vmix agent pkg. OpenCore is then copied into the image's
  ESP so it boots standalone with OVMF.
- customizeImage / templates: boot the image with a FAT-then-HFS+ VMIX volume; the
  vmix agent (LaunchDaemon) runs a script as root, records status and powers off —
  the macOS counterpart of Windows Audit Mode. generalize creates the admin user +
  auto-login (kcpassword), suppresses Setup Assistant, sets hostname/timezone,
  grows APFS, and assigns a fresh SMBIOS identity. Templates: noUpdates,
  performance, remoteAccess (ssh + screen sharing).
- fetchRecovery: Apple recovery BaseSystem, retried until the pinned Tahoe build
  (osrecovery load-balances Sequoia/Tahoe during the rollout). makeAgentPkg builds
  a distribution flat pkg on Linux (xar+bom+cpio) for startosinstall --installpackage.

CLI: vmix build/copy/run for macOS (run --macos --vnc, reads the image's MAC from
its ESP), and a `vmix macserial` helper. NixOS module: disks.os.file carrying
_vmixOsType="macos" auto-enables the macOS QEMU profile (AppleSMC+OSK, Skylake
CPU spoof, AHCI system disk, VMware SVGA, pinned NIC); macos.{enable,cpu,mac}.

Status: proven through the installer prepare phase (SharedSupport.dmg mounts,
version 26.6.2 read, SU catalog loads). Two blockers remain, documented in
lib/images/macos/README.md: (1) startosinstall's OSISVerifyBaseSystemOperation
rejects the byte-identical plain-UDIF SharedSupport as "pkgdmg missing a footer"
in this Tahoe recovery/VM; (2) Apple's CDN unreliably serves the Tahoe recovery
during rollout (self-hosting the verified BaseSystem is the robust fix).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XsESshRCoBoUVWV9qKURUF
2026-09-10 13:33:38 -03:00

49 lines
1.4 KiB
Nix

{
description = "vmix composable QEMU VM image building and orchestration";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
};
outputs = { self, nixpkgs, ... }:
let
system = "x86_64-linux";
pkgs = import nixpkgs {
inherit system;
config.allowUnfree = true;
};
lib = pkgs.lib;
vmixLib = import ./lib { inherit pkgs lib system; };
in {
overlays.default = final: prev: { inherit vmixLib; };
nixosModules.default = { config, pkgs, lib, ... }: {
imports = [ ./nixos/default.nix ];
config.nixpkgs.overlays = [ self.overlays.default ];
};
lib.${system} = vmixLib;
packages.${system}.default = import ./cli.nix { inherit pkgs self system vmixLib; };
apps.${system}.default = {
type = "app";
program = "${self.packages.${system}.default}/bin/vmix";
};
devShells.${system}.default = pkgs.mkShell {
shellHook = ''
# vmix CLI available as local flake
export VMIX_FLAKE="path:$PWD"
alias vmix='nix run "$VMIX_FLAKE" --'
# bash prompt
PROMPT_COMMAND='PS1_CMD1=$(git branch --show-current 2>/dev/null)'; PS1='\[\e[1;7m\]$?\[\e[0m\] \[\e[2m\]\A\[\e[0m\] \[\e[91m\]\u@\h\[\e[0m\] \[\e[92;1m\]\w\[\e[0m\] \[\e[96m\]''${PS1_CMD1}\[\e[0m\] \[\e[1;2m\]$\[\e[0;1m\] \[\e[0m\]'
'';
buildInputs = with pkgs; [
bashInteractive
git
];
};
};
}