feat(CI): add macOS to our CI (#3321)

Co-Authored-By: Meerd <meerd@users.noreply.github.com>

.github/workflows/core_build.yml

@@ -52,6 +52,28 @@ jobs:
       - name: Run unit tests
         run: source ./apps/ci/ci-run-unit-tests.sh
 
+  mac-build:
+    strategy:
+      fail-fast: false
+    runs-on: macos-10.15
+    name: macos-10.15
+    steps:
+      - uses: actions/checkout@v2
+      - name: Cache
+        uses: actions/cache@v1.1.2
+        with:
+          path: /Users/runner/.ccache
+          key: ccache:macos-10.15:${{ github.ref }}:${{ github.sha }}
+          restore-keys: |
+            ccache:macos-10.15:${{ github.ref }}
+            ccache:macos-10.15
+      - name: Configure OS
+        run: source ./apps/ci/mac/ci-install.sh
+      - name: Build
+        run: source ./apps/ci/mac/ci-compile.sh
+      - name: Run unit tests
+        run: source ./apps/ci/ci-run-unit-tests.sh
+
   docker-build:
     strategy:
       fail-fast: true