From c5084cf2f48242a4f2acc6091b27a27629c2410f Mon Sep 17 00:00:00 2001
From: Anas Khan <83116240+anxkhn@users.noreply.github.com>
Date: Mon, 27 Jul 2026 23:18:53 +0530
Subject: [PATCH] GH-50531: [Python][Packaging] Set macOS deployment target
 before wheel tag

Set the default MACOSX_DEPLOYMENT_TARGET before deriving _PYTHON_HOST_PLATFORM so local builds without an explicit target produce a valid platform tag. Preserve explicit deployment targets unchanged.

Signed-off-by: Anas Khan <83116240+anxkhn@users.noreply.github.com>
---
 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 a9afd9127296..b931dfa4dd23 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