diff --git a/.github/workflows/build-nuget-package.yml b/.github/workflows/build-nuget-package.yml
index bbd55ad4f6..ab9bb2d3af 100644
--- a/.github/workflows/build-nuget-package.yml
+++ b/.github/workflows/build-nuget-package.yml
@@ -7,9 +7,9 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  # macos 12 is Intel
-  build_macos_12:
-    runs-on: macos-latest
+  # macos 13 is Intel
+  build_macos_13:
+    runs-on: macos-13
     # strategy:
       # matrix:
       #   python: [3.11]
@@ -32,7 +32,7 @@ jobs:
           name: macos-x64
           path: ${{runner.workspace}}/build/dotnet/Highs.Native/runtimes
             
-  # macos 14 is M1 (beta)
+  # macos 14 is M1
   build_macos_14:
     runs-on: macos-14 
     steps:
@@ -124,7 +124,7 @@ jobs:
 
   build_windows:
     runs-on: windows-latest
-    needs: [build_macos_12, build_macos_14, build_windows_32, build_linux, build_linux_arm64]
+    needs: [build_macos_13, build_macos_14, build_windows_32, build_linux, build_linux_arm64]
     steps:
       - uses: actions/checkout@v4
       - name: Build HiGHS Windows native
diff --git a/.github/workflows/build-python-package.yml b/.github/workflows/build-python-package.yml
index 0cb1f6f500..7e25f1f36f 100644
--- a/.github/workflows/build-python-package.yml
+++ b/.github/workflows/build-python-package.yml
@@ -105,38 +105,6 @@ jobs:
           python3 -m pip install pytest
           python3 -m pytest $GITHUB_WORKSPACE
           
-          
-  # macos 12 is Intel
-  build_wheel_macos_12:
-    runs-on: macos-latest
-    strategy:
-      matrix:
-        python: [3.11]
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Install correct python version
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python }}
-
-      - name: Build wheel
-        run: |
-          python3 -m pip install cibuildwheel
-          python3 -m cibuildwheel --only cp311-macosx_x86_64 $GITHUB_WORKSPACE
-
-      - name: Install wheel
-        run: |
-          ls wheelhouse
-          python3 --version
-          python3 -m pip install wheelhouse/*.whl
-          python3 -c "import highspy; print(dir(highspy))"
-
-      - name: Test highspy
-        run: |
-          python3 -m pip install pytest 
-          python3 -m pytest $GITHUB_WORKSPACE
-            
   # macos 13 is Intel
   build_wheel_macos_13:
     runs-on: macos-13
@@ -168,7 +136,7 @@ jobs:
           python3 -m pip install pytest
           python3 -m pytest $GITHUB_WORKSPACE
             
-  # macos 14 is M1 (beta)
+  # macos 14 is M1
   build_wheel_macos_14:
     runs-on: macos-14 
     strategy: