Select Xcode version for python packaging CI

.github/workflows/python-ci-packaging.yml

@@ -168,6 +168,10 @@ jobs:
           fetch-depth: 0  # for setuptools-scm
       - name: Check if System Integrity Protection (SIP) is enabled
         run: csrutil status
+      - name: Select XCode version
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: '15.4'
       - name: Install pre-built libtiledb
         if: ${{ matrix.TILEDB_EXISTS == 'yes' }}
         run: |

.github/workflows/python-packaging.yml

@@ -84,6 +84,11 @@ jobs:
           pip install setuptools
           python -c 'from distutils import util; print("distutil.util.get_platform:", util.get_platform())'
           python -c 'import platform; print("platform.platform()", platform.platform())'
+      - name: Select XCode version
+        if: startsWith(matrix.os, 'macos')
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: '15.4'
       - name: Build wheels
         uses: pypa/[email protected]
         with: