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[Doc] Fix macOS installation dependency resolution issue (#26721)

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Signed-off-by: faisal shah <fashah@redhat.com>
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Fasal Shah 2025-11-14 18:13:56 +05:30 committed by GitHub
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docs/getting_started/installation/cpu.apple.inc.md
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@ -28,10 +28,15 @@ After installation of XCode and the Command Line Tools, which include Apple Clan
```bash
git clone https://github.com/vllm-project/vllm.git
cd vllm
uv pip install -r requirements/cpu.txt
uv pip install -r requirements/cpu.txt --index-strategy unsafe-best-match
uv pip install -e .
```
!!! tip
The `--index-strategy unsafe-best-match` flag is needed to resolve dependencies across multiple package indexes (PyTorch CPU index and PyPI). Without this flag, you may encounter `typing-extensions` version conflicts.
The term "unsafe" refers to the package resolution strategy, not security. By default, `uv` only searches the first index where a package is found to prevent dependency confusion attacks. This flag allows `uv` to search all configured indexes to find the best compatible versions. Since both PyTorch and PyPI are trusted package sources, using this strategy is safe and appropriate for vLLM installation.
!!! note
On macOS the `VLLM_TARGET_DEVICE` is automatically set to `cpu`, which is currently the only supported device.