Switch only macOS back to MPICH

Author: LourensVeen

.github/workflows/test-framework.yml

@@ -37,10 +37,16 @@ jobs:
         conda info
         conda list
 
-    - name: Install dependencies
+    - name: Install dependencies (Linux)
+      if: ${{ startsWith(matrix.os, 'ubuntu') }}
       run: |
         conda install c-compiler cxx-compiler fortran-compiler 'gfortran<14' python-gil pkgconfig coreutils patch curl tar unzip gzip bzip2 xz perl bison make cmake openmpi gsl fftw gmp mpfr hdf5 netcdf4 libopenblas liblapack zlib pip wheel 'docutils>=0.6' 'mpi4py>=1.1.0' 'numpy>=1.2.2' 'h5py>=1.1.0' pytest
 
+    - name: Install dependencies (macOS)
+      if: ${{ startsWith(matrix.os, 'macos') }}
+      run: |
+        conda install c-compiler cxx-compiler fortran-compiler 'gfortran<14' python-gil pkgconfig coreutils patch curl tar unzip gzip bzip2 xz perl bison make cmake mpich gsl fftw gmp mpfr hdf5 netcdf4 libopenblas liblapack zlib pip wheel 'docutils>=0.6' 'mpi4py>=1.1.0' 'numpy>=1.2.2' 'h5py>=1.1.0' pytest
+
     - name: Checkout
       uses: actions/checkout@v4
       with: