diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index 0f3c5977..7c0ccc7e 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -102,12 +102,16 @@ jobs:
       github.event_name != 'workflow_dispatch' ||
       github.event.inputs.run_build_bdist == 'true'
 
+    defaults:
+      run:
+        shell: bash -el {0}
+
     steps:
-      # HACK: GitHub (macOS) runner image version (for deployment target).
-      - name: Extract (macOS) runner image version
-        run: >-
-          echo "IMAGE_VERSION=$(sw_vers --productVersion | cut -d '.' -f 1).0"
-          >> $GITHUB_ENV
+      # # HACK: GitHub (macOS) runner image version (for deployment target).
+      # - name: Extract (macOS) runner image version
+      #   run: >-
+      #     echo "IMAGE_VERSION=$(sw_vers --productVersion | cut -d '.' -f 1).0"
+      #     >> $GITHUB_ENV
 
       # HACK: GitHub macOS runner defaults to a broken release of Xcode.
       # See https://github.com/actions/runner-images/issues/9273.
@@ -120,13 +124,33 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up Python 3
-        uses: actions/setup-python@v5
+      # - name: Set up Python 3
+      #   uses: actions/setup-python@v5
+      #   with:
+      #     python-version: '3.x'
+
+      - name: Set up (Mini)conda
+        uses: conda-incubator/setup-miniconda@v3
         with:
-          python-version: '3.x'
+          activate-environment: cibw
+          channels: conda-forge
+          channel-priority: strict
+
+      # - name: Install packaging requirements
+      #   run: python -m pip install --upgrade twine
 
       - name: Install packaging requirements
-        run: python -m pip install --upgrade twine
+        run: |
+          conda install -y twine
+          # Manage dependencies with Conda packages.
+          conda install -y cxx-compiler
+          conda install -y gsl fftw llvm-openmp
+          # Export Conda path.
+          conda_root=$(conda config --show root_prefix | sed 's/root_prefix: //')
+          echo "CONDA_ENV=${conda_root}/envs/cibw" >> $GITHUB_ENV
+          echo "CXX=${conda_root}/envs/cibw/bin/${CXX}" >> $GITHUB_ENV
+          echo "CXXFLAGS=${CXXFLAGS}" >> $GITHUB_ENV
+          echo "LDFLAGS=${LDFLAGS}" >> $GITHUB_ENV
 
       - name: Build built distribution
         uses: pypa/cibuildwheel@v2.18.1
@@ -135,19 +159,15 @@ jobs:
           output-dir: dist/
           config-file: pyproject.toml
         env:
-          # Default to GCC compiler and OpenMP on macOS.
-          # HACK: Hardcode g++ compiler choice on GitHub macOS runners
-          # due to unusual Homebrew paths. In the CIBW workflow, Homebrew
-          # 'fftw' formula installs g++-14 as a dependency which conflicts
-          # with the runner image.
-          CIBW_ENVIRONMENT_MACOS: >-
-            PY_CXX=$(brew --prefix)/bin/g++-14
-            PY_CXXFLAGS=-I$(brew --prefix)/include
-            PY_LDFLAGS=-L$(brew --prefix)/lib
-          # HACK: Hardcode macOS deployment target to align with the
-          # GitHub runner image version. In the CIBW workflow,
-          # Homebrew-installed libraries and `delocate-wheel` enforce this.
-          MACOSX_DEPLOYMENT_TARGET: ${{ env.IMAGE_VERSION }}
+          # # Default to GCC compiler and OpenMP on macOS.
+          # # HACK: Hardcode g++ compiler choice on GitHub macOS runners
+          # # due to unusual Homebrew paths. In the CIBW workflow, Homebrew
+          # # 'fftw' formula installs g++-14 as a dependency which conflicts
+          # # with the runner image.
+          # CIBW_ENVIRONMENT_MACOS: >-
+          #   PY_CXX=$(brew --prefix)/bin/g++-14
+          #   PY_CXXFLAGS=-I$(brew --prefix)/include
+          #   PY_LDFLAGS=-L$(brew --prefix)/lib
           # # Switch to LLVM compiler and OpenMP on macOS.
           # CIBW_ENVIRONMENT_MACOS: >-
           #   PY_CXX=$(brew --prefix llvm@15)/bin/clang++
@@ -156,6 +176,27 @@ jobs:
           #   PY_OMP=1
           #   PY_CXXFLAGS_OMP="-I$(brew --prefix libomp)/include -fopenmp"
           #   PY_LDFLAGS_OMP="-L$(brew --prefix libomp)/lib -lomp"
+          # # HACK: Hardcode macOS deployment target to align with the
+          # # GitHub runner image version. In the CIBW workflow,
+          # # Homebrew-installed libraries and `delocate-wheel` enforce this.
+          # MACOSX_DEPLOYMENT_TARGET: ${{ env.IMAGE_VERSION }}
+          # Switch to Conda environment for dependencies.
+          # HACK: Hardcode g++ compiler choice on GitHub macOS runners
+          # due to unusual Homebrew paths.
+          CIBW_ENVIRONMENT_MACOS: >-
+            PY_CXX=${{ env.CXX }}
+            PY_CXXFLAGS="${{ env.CXXFLAGS }} -I$(brew --prefix)/include"
+            PY_LDFLAGS="${{ env.LDFLAGS }}"
+            PY_OMP=1
+            PY_BUILD_PARALLEL='-j'
+            MACOSX_DEPLOYMENT_TARGET=11.0
+            SYSTEM_VERSION_COMPAT=0
+          MACOSX_DEPLOYMENT_TARGET: "11.0"
+          SYSTEM_VERSION_COMPAT: '0'
+          CIBW_BEFORE_ALL_MACOS:
+          CIBW_REPAIR_WHEEL_COMMAND_MACOS: |
+            delocate-listdeps {wheel}
+            delocate-wheel --require-archs {delocate_archs} -w {dest_dir} -v {wheel}
 
       - name: Verify built distribution
         run: python -m twine check --strict dist/*