Which multiprocessing start method ensures compatible behavior across Linux, macOS, and Windows in Python 3.8+?
Goal Identify a start method that allows a library using multiprocessing to run reliably on Linux (default fork ), macOS (default spawn since 3.8), and Windows (only spawn ) without requiring application‑level changes. Constraints and uncertainty Changing the start method after any process creation raises RuntimeError . Third‑party code may implicitly depend
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