BUILD: fix wheels for macOS 10.13 (#5521)

grlee77 · hmaarrfk · web-flow · commit c1a284c5b1b2 · 2021-09-01T19:22:09.000-04:00
This fix was adapted by @hmaarrfk from scikit-learn/scikit-learn#19064 Co-authored-by: Mark Harfouche <mark.harfouche@gmail.com> Co-authored-by: Mark Harfouche <mark.harfouche@gmail.com>
diff --git a/.github/workflows/wheel_tests_and_release.yml b/.github/workflows/wheel_tests_and_release.yml
@@ -59,7 +59,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [macos-latest]
-
+    env:
+      MACOSX_DEPLOYMENT_TARGET: "10.13"
     steps:
       - uses: actions/checkout@v2
         with:
@@ -75,7 +76,14 @@ jobs:
           python -m pip install cibuildwheel
       - name: Build wheels for CPython 3.9 and Mac OS
         run: |
-          brew install libomp
+          # Make sure to use a libomp version binary compatible with the oldest
+          # supported version of the macos SDK as libomp will be vendored into the
+          # scikit-learn wheels for macos. The list of bottles can be found at:
+          # https://formulae.brew.sh/api/formula/libomp.json. Currently, the oldest
+          # supported macos version is: High Sierra / 10.13. When upgrading this, be
+          # sure to update the MACOSX_DEPLOYMENT_TARGET environment variable
+          wget https://homebrew.bintray.com/bottles/libomp-11.0.0.high_sierra.bottle.tar.gz
+          brew install libomp-11.0.0.high_sierra.bottle.tar.gz
           python -m cibuildwheel --output-dir dist
         env:
           CIBW_BUILD: "cp39-*"
