Git Sagar
242e48a5fc
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
28 lines
1.4 KiB
Nix
28 lines
1.4 KiB
Nix
# Take apart InstallAssistant.pkg on Linux:
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# installer-app.tar "Install macOS <name>.app" skeleton (Payload, pbzx+cpio)
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# installer.json byte offsets of SharedSupport.dmg inside the pkg
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# app-name e.g. "Install macOS Tahoe.app"
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# The 18 GB SharedSupport.dmg is never copied on the host; makeImage exposes that
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# byte range of the pkg as a raw disk and the recovery script copies it into the app.
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{ pkgs, lib, ... }:
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{ name, pkg }:
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pkgs.runCommand "${name}-installer-payload" {
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nativeBuildInputs = with pkgs; [ xar pbzx cpio python3 gnutar ];
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} ''
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mkdir -p $out
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xar --dump-toc=toc.xml -f ${pkg}
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python3 ${./xar-toc.py} toc.xml ${pkg} > $out/installer.json
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grep -q '"SharedSupport.dmg"' $out/installer.json || { echo "no SharedSupport.dmg in pkg"; exit 1; }
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grep -A4 '"SharedSupport.dmg"' $out/installer.json | grep -q '"encoding": "application/octet-stream"' \
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|| { echo "SharedSupport.dmg is compressed inside the xar, cannot map it as a disk"; exit 1; }
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echo "=== vmix: extracting installer app skeleton ==="
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xar -x -f ${pkg} Payload
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mkdir root
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(cd root && pbzx -n ../Payload | cpio -idm --quiet)
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APP=$(ls root/Applications | grep -E '^Install macOS.*\.app$' | head -1)
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[ -n "$APP" ] || { echo "installer app not found in Payload"; ls -R root | head; exit 1; }
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echo "$APP" > $out/app-name
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tar -C root/Applications -cf $out/installer-app.tar "$APP"
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ls -la $out
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''
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