Run Mac builds in a matrix.

.github/workflows/mac.yml

@@ -3,12 +3,24 @@ name: Mac
 on: [push, pull_request]
 
 env:
-  QTIFWVER: 4.1.0
   NJOBS: 4
 
 jobs:
   build:
-    runs-on: macos-latest
+    strategy:
+      max-parallel: 10
+      fail-fast: false
+      matrix:
+       include:
+         - os: macos-13
+           upload: 0
+         - os: macos-12
+           upload: 0
+         - os: macos-11
+           upload: 1
+    runs-on: ${{ matrix.os }}
+    env:
+      UPLOAD: ${{ matrix.upload }}
     steps:
     - uses: actions/checkout@v2
     - name: Install dependencies
@@ -41,14 +53,14 @@ jobs:
         ./ports/ci/mac/deploy.sh
     - name: Release Upload
       uses: softprops/action-gh-release@v1
-      if: ${{ startsWith(github.ref, 'refs/tags/') }}
+      if: ${{ startsWith(github.ref, 'refs/tags/') && matrix.upload }}
       with:
         files: packages/mac/*
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     - name: Daily Build Upload
       uses: softprops/action-gh-release@v1
-      if: ${{ !startsWith(github.ref, 'refs/tags/') }}
+      if: ${{ !startsWith(github.ref, 'refs/tags/') && matrix.upload }}
       with:
         body: "${{ github.event.head_commit.message }} (commit: ${{ github.sha }})"
         prerelease: true