diff --git a/.github/workflows/r_macos.yml b/.github/workflows/r_macos.yml
index edaab83b..eaff706d 100644
--- a/.github/workflows/r_macos.yml
+++ b/.github/workflows/r_macos.yml
@@ -31,11 +31,13 @@
 #       - name: Update Homebrew
 #         run: |
 #           brew update
+#
 #       - name: Install pandoc
 #         run: |
 #           for i in {1..3}; do
 #             brew install pandoc && break || sleep 15
 #           done
+#
 #       - name: Set up R ${{ matrix.r-version }}
 #         uses: r-lib/actions/setup-r@v2
 #         with:
@@ -44,11 +46,10 @@
 #       - name: Install R dependencies
 #         run: |
 #           Rscript -e "install.packages(c('remotes', 'rcmdcheck', 'reticulate', 'renv', 'knitr', 'rmarkdown', 'lsa', 'purrr', 'testthat', 'htmltools'), repos='https://cran.r-project.org')"
-#           Rscript -e "if (getRversion() >= '4.4.0') remotes::install_version('Matrix', version = '1.5.3')"
+#           Rscript -e "if (getRversion() >= '4.4.0') remotes::install_version('Matrix', version = '1.5.3') else install.packages('Matrix', type = 'binary')"
 #           Rscript -e "remotes::install_version('htmltools', version = '0.5.8')"
 #           Rscript -e "renv::restore()"
 #
-#
 #       - name: Set up Python
 #         uses: actions/setup-python@v2
 #         with:
@@ -66,6 +67,7 @@
 #           pip install --upgrade pip
 #           pip install scipy==1.12.0
 #           pip install flair
+#
 #       - name: Remove Python cache files
 #         run: find . -name '*.pyc' -delete
 #
@@ -98,15 +100,13 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Update Homebrew
+      - name: Update Homebrew and Install gfortran
         run: |
           brew update
-
-      - name: Install pandoc
-        run: |
-          for i in {1..3}; do
-            brew install pandoc && break || sleep 15
-          done
+          brew install gcc
+          echo "FC=$(brew --prefix)/bin/gfortran" >> ~/.R/Makevars
+          echo "F77=$(brew --prefix)/bin/gfortran" >> ~/.R/Makevars
+          echo "FLIBS=-L$(brew --prefix)/lib/gcc/current -lgfortran -lquadmath -lm" >> ~/.R/Makevars
 
       - name: Set up R ${{ matrix.r-version }}
         uses: r-lib/actions/setup-r@v2