Backport ARM build for MacOS from 2.5 branch

.github/workflows/build.yml

@@ -9,7 +9,7 @@ jobs:
       - name: Python Setup
         uses: actions/setup-python@v5
         with:
-          python-version: "3.11"
+          python-version: "3.12"
           architecture: x64
 
       - name: Install Packages (apt)
@@ -35,7 +35,7 @@ jobs:
             novelwriter/assets/manual.pdf
             novelwriter/assets/i18n/*.qm
           if-no-files-found: error
-          retention-days: 1
+          retention-days: 14
 
   buildLinux:
     needs: buildAssets
@@ -72,11 +72,16 @@ jobs:
           name: AppImage-${{ matrix.python-version }}-${{ matrix.linux-tag }}
           path: dist_appimage
           if-no-files-found: error
-          retention-days: 1
+          retention-days: 14
 
-  buildMac:
+  buildMac-AMD64:
     needs: buildAssets
+    # Stay on macos-12 due to https://github.com/create-dmg/create-dmg/issues/143
     runs-on: macos-12
+    env:
+      PYTHON_VERSION: "3.12"
+      PACKAGE_ARCH: x86_64
+      MINICONDA_ARCH: x86_64
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -88,12 +93,40 @@ jobs:
           path: novelwriter/assets
 
       - name: Build App Bundle
-        run: ./setup/macos/build.sh
+        run: ./setup/macos/build.sh $PYTHON_VERSION $PACKAGE_ARCH $MINICONDA_ARCH
 
       - name: Upload DMG
         uses: actions/upload-artifact@v4
         with:
-          name: MacOS-DMG
+          name: MacOS-AMD64-DMG
           path: dist_macos
           if-no-files-found: error
-          retention-days: 1
+          retention-days: 14
+
+  buildMac-M1:
+    needs: buildAssets
+    runs-on: macos-14
+    env:
+      PYTHON_VERSION: "3.12"
+      PACKAGE_ARCH: aarch64
+      MINICONDA_ARCH: arm64
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Download Artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: nw-assets
+          path: novelwriter/assets
+
+      - name: Build App Bundle
+        run: ./setup/macos/build.sh $PYTHON_VERSION $PACKAGE_ARCH $MINICONDA_ARCH
+
+      - name: Upload DMG
+        uses: actions/upload-artifact@v4
+        with:
+          name: MacOS-M1-DMG
+          path: dist_macos
+          if-no-files-found: error
+          retention-days: 14