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new 8e7a1f9899 GH-50531: [Python][Packaging] Set macOS deployment target
before building wheel platform tag (#50377)
8e7a1f9899 is described below
commit 8e7a1f9899549ba2e4d5015a84b04bb98f411838
Author: Anas Khan <[email protected]>
AuthorDate: Thu Aug 13 17:07:21 2026 +0530
GH-50531: [Python][Packaging] Set macOS deployment target before building
wheel platform tag (#50377)
### Rationale for this change
`ci/scripts/python_wheel_macos_build.sh` builds `_PYTHON_HOST_PLATFORM`
from `MACOSX_DEPLOYMENT_TARGET` before the script applies its default of
`12.0`. When the variable is unset, the tag becomes `macosx--<arch>` even
though the rest of the build still targets macOS 12.0.
### What changes are included in this PR?
Move the deployment-target default above the platform-tag export so the tag
always uses the resolved value. An explicit `MACOSX_DEPLOYMENT_TARGET` is still
honored.
### Are these changes tested?
I checked the two host-platform outcomes from the same assignment the
script uses:
- unset `MACOSX_DEPLOYMENT_TARGET` yields `macosx-12.0-x86_64`
- `MACOSX_DEPLOYMENT_TARGET=13.0` yields `macosx-13.0-x86_64`
Crossbow macOS wheel jobs were also submitted on this branch after the
rebase.
### Are there any user-facing changes?
No public API change. Local or manual macOS wheels that rely on the default
now get a valid platform tag instead of `macosx--<arch>`.
* GitHub Issue: #50531
Authored-by: Anas Khan <[email protected]>
Signed-off-by: Raúl Cumplido <[email protected]>
---
ci/scripts/python_wheel_macos_build.sh | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/ci/scripts/python_wheel_macos_build.sh
b/ci/scripts/python_wheel_macos_build.sh
index a9afd91272..b931dfa4dd 100755
--- a/ci/scripts/python_wheel_macos_build.sh
+++ b/ci/scripts/python_wheel_macos_build.sh
@@ -33,8 +33,8 @@ rm -rf "${source_dir}"/python/pyarrow/*.so
rm -rf "${source_dir}"/python/pyarrow/*.so.*
echo "=== (${PYTHON_VERSION}) Set SDK, C++ and Wheel flags ==="
-export _PYTHON_HOST_PLATFORM="macosx-${MACOSX_DEPLOYMENT_TARGET}-${arch}"
export MACOSX_DEPLOYMENT_TARGET="${MACOSX_DEPLOYMENT_TARGET:-12.0}"
+export _PYTHON_HOST_PLATFORM="macosx-${MACOSX_DEPLOYMENT_TARGET}-${arch}"
export SDKROOT="${SDKROOT:-$(xcrun --sdk macosx --show-sdk-path)}"
if [ "$arch" = "arm64" ]; then
