Update CI.yml

.github/workflows/CI.yml

@@ -53,6 +53,20 @@ jobs:
       - name: Check Julia SSL certifications 🔎🔐
         run: julia -e 'using NetworkOptions; println(NetworkOptions.bundled_ca_roots()); println(NetworkOptions.ca_roots())'
         shell: bash -el {0}
+      - name: Install dependencies on Ubuntu
+        if: matrix.os == 'ubuntu-latest'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libxml2
+          echo "/usr/lib/x86_64-linux-gnu" | sudo tee -a /etc/ld.so.conf.d/libxml2.conf
+          sudo ldconfig
+        shell: bash -el {0}
+      - name: Install dependencies on macOS
+        if: matrix.os == 'macos-latest'
+        run: |
+          brew install libxml2
+          export PKG_CONFIG_PATH="/usr/local/opt/libxml2/lib/pkgconfig"
+        shell: bash -el {0}
       - uses: julia-actions/cache@v2
         with:
           cache-registries: "true"
@@ -67,14 +81,6 @@ jobs:
             ${{ runner.os }}-test-${{ env.cache-name }}-
             ${{ runner.os }}-test-
             ${{ runner.os }}-
-      - name: Install dependencies on Ubuntu
-        if: matrix.os == 'ubuntu-latest'
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y libxml2
-          echo "/usr/lib/x86_64-linux-gnu" | sudo tee -a /etc/ld.so.conf.d/libxml2.conf
-          sudo ldconfig
-        shell: bash -el {0}
       - uses: julia-actions/julia-buildpkg@v1
         env:
           JULIA_SSL_CA_ROOTS_PATH: ""