53ee9ce2ec
Previously the workflow ran the dispatch tests on two matrix legs (linux-cpu-spoof + macos-m1-real), which duplicated the spoofed hardware matrix (it works identically on any host) while only the Mac leg covered Apple-specific real-mlx checks. Drop the Linux leg, rename the workflow to "MLX CI on Mac M1", and rely on the Mac runner alone -- it now runs the SAME spoofed matrix PLUS the three real-Apple-Silicon checks (real `_IS_MLX = True`, real mlx wheel smoke imports, no spoof collisions with the live environment). Also fix the `apple_silicon_no_mlx` profile so the spoof works on a real Mac with mlx genuinely installed. Studio's `_has_mlx()` does literal `import mlx.core` and catches `ImportError`, which the previous spoof (delete `sys.modules["mlx"]` + patch `find_spec`) could not block when mlx was on disk -- Python would re-find and import the real package. The fix installs a `MetaPathFinder` for the duration of the spoof that raises `ImportError` for `mlx` / `mlx.*`, faithfully simulating "mlx not installed" regardless of whether the host has the wheel. No change to the dispatch logic in unsloth or studio; the Mac runner now exercises every profile end to end with the real wheels installed. Validated locally on .macsim_venv3 with a stand-in `mlx` package on disk at .fakemlx_pkg/ to mimic the macos-14 runner: 35 passed + 1 skipped. |
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