Revert Mac test runner back to x86_64 because arm64 gives issues that I don't want to solve right now

Author: jobovy

.github/workflows/build.yml

@@ -192,15 +192,15 @@ jobs:
             REQUIRES_ASTROQUERY: true
             REQUIRES_NUMBA: false
             REQUIRES_JAX: false
-          - os: macos-latest
+          - os: macos-12
             python-version: "3.12"
             TEST_FILES: tests/test_orbit.py -k test_energy_jacobi_conservation
             REQUIRES_PYNBODY: true
             REQUIRES_ASTROPY: true
             REQUIRES_ASTROQUERY: true
             REQUIRES_NUMBA: false
             REQUIRES_JAX: false
-          - os: macos-latest
+          - os: macos-12
             python-version: "3.12"
             TEST_FILES: tests/test_orbit.py tests/test_orbits.py -k 'not test_energy_jacobi_conservation'
             REQUIRES_PYNBODY: true
@@ -227,7 +227,7 @@ jobs:
       run: |
          sudo apt-get install libgsl-dev
     - name: Install the GSL
-      if: matrix.os == 'macos-latest'
+      if: matrix.os == 'macos-12'
       run: |
          brew install gsl
          echo "CFLAGS=-I$(brew --prefix)/include" >> $GITHUB_ENV
@@ -281,7 +281,7 @@ jobs:
         python setup.py build_ext --no-openmp --coverage --single_ext --inplace
         python setup.py develop --single_ext
     - name: Install package
-      if: matrix.os == 'macos-latest'
+      if: matrix.os == 'macos-12'
       run: |
         python -m pip install -v .
     - name: Special config