macOS ARM support for f3probe#279

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mgarciaisaia:f3probe-macos

Commits on May 31, 2026

f3probe: port the device backend to macOS (Apple Silicon) — UNVALIDATED

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spike: add --real-size to aim the aliasing write at the wrap boundary

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fix: F_FULLFSYNC is invalid on a raw disk node (ENOTTY) — use DKIOCSYNCHRONIZECACHE

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PORT-LOG: record Phase 1 cache-defeat PASS on the limbo card

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libdevs(darwin): print offset/errno/alignment on raw I/O failure

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libdevs(darwin): use sysconf(_SC_PAGESIZE), not getpagesize()

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PORT-LOG: Phase 4 verdict MATCH on the limbo card (+ determinism caveat)

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docs: Phase 5 determinism PASS; state honest validation scope

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Commits on Jun 4, 2026

libdevs(darwin): handle write-protected cards; explain root EACCES

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Drop development artifacts for macOS port
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