Update github_action.yml

.github/workflows/github_action.yml

@@ -7,11 +7,11 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build:
+  build-ubuntu:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
     timeout-minutes: 30
     steps:
     - uses: actions/checkout@v2
@@ -21,6 +21,24 @@ jobs:
       run: cmake --build build --config Release -- -j 2
     - name: Run tests
       run: cd build && ctest -E 'perf_test' --extra-verbose # execute unit_test and unit_test_opencl
+  build-macos:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-latest]
+    timeout-minutes: 30
+    steps:
+    - uses: actions/checkout@v2
+    - name: Configure
+      run: mkdir build && cd build && cmake ..
+    - name: Build
+      run: cmake --build build --config Release -- -j 2
+    - name: Run tests
+      run: cd build && ctest -E 'perf_test' --extra-verbose # execute unit_test and unit_test_opencl
+      env:
+        # TODO: remove this disabled option. It was added due to libpng error:
+        #       libpng warning: Application built with libpng-1.4.12 but running with 1.6.42
+        PENGUINV_ENABLE_PNG_SUPPORT: OFF
   python_on_windows:
     runs-on: windows-latest
     strategy: