Ci/check macos virtualization#159
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simongdavies merged 2 commits intoMay 19, 2026
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Adds a workflow_dispatch-only job that runs on an Apple Silicon (arm64) GitHub-hosted macOS runner and reports whether the Virtualization framework is available. Probes layer from cheapest to most authoritative: runner identity dump, arm64 assertion, kern.hv_support sysctl, framework bundle presence, and finally VZVirtualMachine.isSupported via an inline Swift program. Writes a result table to the job step summary.
On Apple Silicon kern.hv_support does not exist, so the previous hard-fail was wrong. Demote sysctl inspection to diagnostic-only (now also captures kern.hv_vmm_present and CPU brand), let the Swift VZVirtualMachine.isSupported probe be the sole pass/fail signal, and record each step's findings to GITHUB_OUTPUT so the always()-summary renders an accurate table even when later steps fail.
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Pull request overview
Adds a manually triggered GitHub Actions workflow to inspect whether GitHub-hosted macOS runners can support Hyperlight-style micro-VM virtualization through Apple’s Virtualization.framework.
Changes:
- Adds runner identity and hypervisor diagnostic reporting.
- Adds a Swift-based
VZVirtualMachine.isSupportedprobe as the workflow pass/fail check. - Publishes a workflow summary with OS, CPU, framework, and virtualization support details.
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| name: Inspect Virtualization.framework on ARM macOS | ||
| runs-on: macos-latest |
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| # verify before betting on macOS hosting (see /memories/azure-hosting-kvm.md | ||
| # for why "just use platform X" warrants a real check first). |
simongdavies
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