Be explicit about runner choices on macOS

.github/workflows/main.yml

@@ -33,51 +33,51 @@ defaults:
 jobs:
   tests:
     name: ${{ matrix.os }}, Python ${{ matrix.python-version }}, ${{ matrix.conda-standalone }}
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         include:
           # UBUNTU
-          - os: ubuntu
+          - os: ubuntu-latest
             python-version: "3.8"
             conda-standalone: conda-standalone
             check-docs: true
-          - os: ubuntu
+          - os: ubuntu-latest
             python-version: "3.9"
             conda-standalone: conda-standalone
             check-docs: true
-          - os: ubuntu
+          - os: ubuntu-latest
             python-version: "3.10"
             conda-standalone: conda-standalone-nightly
-          - os: ubuntu
+          - os: ubuntu-latest
             python-version: "3.11"
             conda-standalone: micromamba
           # MACOS
-          - os: macos
+          - os: macos-13
             python-version: "3.8"
             conda-standalone: conda-standalone-nightly
           # Not running for 3.9 to save some CI resources
           # - os: macos
           #   python-version: "3.9"
           #   conda-standalone: conda-standalone
-          - os: macos
+          - os: macos-13
             python-version: "3.10"
             conda-standalone: micromamba
-          - os: macos
+          - os: macos-13
             python-version: "3.11"
             conda-standalone: conda-standalone
           # WINDOWS
-          - os: windows
+          - os: windows-latest
             python-version: "3.8"
             conda-standalone: conda-standalone
-          - os: windows
+          - os: windows-latest
             python-version: "3.9"
             conda-standalone: conda-standalone-nightly
-          - os: windows
+          - os: windows-latest
             python-version: "3.10"
             conda-standalone: conda-standalone
-          - os: windows
+          - os: windows-latest
             python-version: "3.11"
             # conda-standalone: micromamba
             conda-standalone: conda-standalone-nightly
@@ -89,24 +89,24 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 0
-      - uses: conda-incubator/setup-miniconda@v2
+      - uses: conda-incubator/setup-miniconda@v3
         with:
           activate-environment: constructor-dev
           environment-file: dev/environment.yml
           python-version: ${{ matrix.python-version }}
       - name: Supply extra dependencies and install constructor
         run: |
           files=(--file "tests/requirements.txt")
-          test -f dev/extra-requirements-${{ matrix.os }}.txt \
-            && files+=(--file "dev/extra-requirements-${{ matrix.os }}.txt")
+          test -f dev/extra-requirements-${{ runner.os }}.txt \
+            && files+=(--file "dev/extra-requirements-${{ runner.os }}.txt")
           conda install ${files[@]} -y
           echo "NSIS_USING_LOG_BUILD=1" >> $GITHUB_ENV
           pip install -e . --no-deps --no-build-isolation
       - name: Set up conda executable
         run: |
           if [[ "${{ matrix.conda-standalone }}" == "micromamba" ]]; then
             conda create -yqp "${{ runner.temp }}/micromamba" -c conda-forge micromamba
-            if [[ ${{ matrix.os }} == "windows" ]]; then
+            if [[ "${{ runner.os }}" == "Windows" ]]; then
               echo "CONSTRUCTOR_CONDA_EXE=${{ runner.temp }}/micromamba/Library/bin/micromamba.exe" >> $GITHUB_ENV
             else
               echo "CONSTRUCTOR_CONDA_EXE=${{ runner.temp }}/micromamba/bin/micromamba" >> $GITHUB_ENV
@@ -183,8 +183,10 @@ jobs:
         include:
           - runner: ubuntu-latest
             subdir: linux-64
-          - runner: macos-latest
+          - runner: macos-13
             subdir: osx-64
+          - runner: macos-14  # FUTURE: Use latest
+            subdir: osx-arm64
           - runner: windows-latest
             subdir: win-64
     runs-on: ${{ matrix.runner }}