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Compare sector-equivalent RAW Recovery on the existing Ubuntu runner

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2026-10-05 08:48:26 +02:00
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# macOS 14 TCG prerequisite diagnostic
The isolated RAW Recovery comparison starts from Full candidate `2e2d702e294c39f24c6a3e44e5e94ff793d8774b`. Use `dotnet run --file tools/ci/MacOsNativeDiagnostic.cs -- --run --full --recovery-format raw --output artifacts/native-macos-full`; the manual Full workflow includes this option. Its only runtime variable is the Recovery disk's DMG versus RAW backend. The default remains DMG. CPU, macOS version, permissions, native process probe and all time limits are unchanged.
The existing pinned container's `qemu-img` converts the already-patched DMG, requires sector equality with `qemu-img compare`, and checks that conversion preserved the DMG's SHA256. Both images stay in this run's owned storage. A retained JSON receipt binds both hashes and the successful comparison. The original readonly virtio attachment and I/O thread are preserved; cleanup removes both images with that owned volume. Local `--validate --full --recovery-format raw --source <pristine-pinned-dockur-checkout> --output <fresh-folder>` exercises conversion failures, source mutation and strict backend selection with a mocked QEMU boundary. The generated `raw-recovery-real-qemu-fixture.sh` accepts an already-patched **disposable writable DMG copy** plus destination for an actual container QEMU comparison; it does not patch, mount or boot a guest. This comparison does not yet prove faster guest operation or native application tests.
This manual candidate uses the existing Ubuntu/x64 Docker runner. Before downloading Apple Recovery it tests actual AVX/AVX2 instruction execution in the pinned QEMU binary, then probes a fresh macOS 14+ Recovery guest. It does not install macOS, erase a disk, provision .NET/CLT or run Meeting Assistant tests. Readiness is only a prerequisite for full native CI.
## Profile and evidence