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DOC: Document macOS 3.8 arm64 workaround #1871

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merged 6 commits into from
Jun 27, 2024
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DOC: Document macOS 3.8 arm64 workaround #1871

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545bc79
BUG: Fix bug with macOS 3.8 arm64 URL
larsoner Jun 11, 2024
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TST: Ping
larsoner Jun 11, 2024
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DOC: Update
larsoner Jun 12, 2024
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DOC: Both
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DOC: Both
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larsoner committed Jun 13, 2024
commit 9e7ed4e15184bf37e4cf65ab8357565c2cb6ac58
23 changes: 17 additions & 6 deletions docs/faq.md
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Expand Up @@ -365,12 +365,23 @@ This is fine for simple C extensions, but for more complicated builds on arm64 i

So, if you want to build macOS arm64 wheels on an arm64 runner (e.g., `macos-14`) on Python 3.8, before invoking cibuildwheel, you should install a native arm64 Python 3.8 interpreter on the runner. On GitHub actions you can set this up easily using the `setup-python` action with something like:
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```yaml
- uses: actions/setup-python@v5
with:
python-version: 3.8
if: runner.os == 'macOS' && runner.arch == 'ARM64'
```

!!! tab "GitHub Actions"

```yaml
- uses: actions/setup-python@v5
with:
python-version: 3.8
if: runner.os == 'macOS' && runner.arch == 'ARM64'
```

!!! tab "Other CIs"
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```bash
curl -o /tmp/Python38.pkg https://www.python.org/ftp/python/3.8.10/python-3.8.10-macos11.pkg
sudo installer -pkg /tmp/Python38.pkg -target /
sh "/Applications/Python 3.8/Install Certificates.command"
```

Then cibuildwheel will detect that it's installed and use it instead. However, you probably don't want to build x86_64 wheels on this Python, unless you're happy with them only supporting macOS 11+.

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