Use Intel with 12 cores for free-threading tests for maximum speedup (#118677)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7d9e70a68005e3a8ab652d0eeca6b3efdc0f402e..8f966591c30235173924272fb0a20111c35cdfd2 100644 (file)
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -218,8 +218,8 @@ jobs:
     with:
       config_hash: ${{ needs.check_source.outputs.config_hash }}
       free-threading: true
-      # macos-14 is M1
-      os-matrix: '["macos-14"]'
+      # macos-14-large is Intel with 12 cores (most parallelism)
+      os-matrix: '["macos-14-large"]'
 
   build_ubuntu:
     name: 'Ubuntu'