diff --git a/.github/workflows/actions.yml b/.github/workflows/actions.yml
index a4435b0..72a37da 100644
--- a/.github/workflows/actions.yml
+++ b/.github/workflows/actions.yml
@@ -156,7 +156,8 @@ jobs:
           brew install hdf5@1.14
           brew install automake
           brew install libtool
-          brew install swig
+          # SWIG 4.3.0 with clang failed CI for macos@aarch64 - lol what? => pinnin for now
+          brew install swig@4.2.1
           brew --prefix hdf5
 
       - name: configure with autotools