diff --git a/.github/workflows/manual-mac-pr.yaml b/.github/workflows/manual-mac-pr.yaml
index a9d0d70..d9e5885 100644
--- a/.github/workflows/manual-mac-pr.yaml
+++ b/.github/workflows/manual-mac-pr.yaml
@@ -4,6 +4,9 @@ on:
 permissions:
   checks: write
   contents: write
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 jobs:
   qc:
     uses: ./.github/workflows/qc-mac.yaml