Revert "Replaces deprecated macos-13 runner with macos-15-intel runner"

Author: galabovaa

.github/workflows/build-nuget-package.yml

@@ -7,9 +7,9 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  # Build macos intel
-  build_macos_intel:
-    runs-on: macos-15-intel
+  # macos 13 is Intel
+  build_macos_13:
+    runs-on: macos-13
     # strategy:
       # matrix:
       #   python: [3.11]
@@ -32,9 +32,9 @@ jobs:
           name: macos-x64
           path: ${{runner.workspace}}/build/dotnet/Highs.Native/runtimes
 
-  # Build macos arm64
-  build_macos_arm:
-    runs-on: macos-14  # macos-14 is arm64
+  # macos 14 is M1
+  build_macos_14:
+    runs-on: macos-14 
     steps:
       - uses: actions/checkout@v4
       - name: Build HiGHS
@@ -126,7 +126,7 @@ jobs:
 
   build_windows:
     runs-on: windows-latest
-    needs: [build_macos_intel, build_macos_arm, 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

.github/workflows/build-python-package.yml

@@ -132,8 +132,9 @@ jobs:
           python3 -m pip install pytest
           python3 -m pytest $GITHUB_WORKSPACE
 
-  build_wheel_macos_intel:
-    runs-on: macos-15-intel
+  # macos 13 is Intel
+  build_wheel_macos_13:
+    runs-on: macos-13
     strategy:
       matrix:
         python: [3.11]    
@@ -162,8 +163,9 @@ jobs:
           python3 -m pip install pytest
           python3 -m pytest $GITHUB_WORKSPACE
             
-  build_wheel_macos_arm:
-    runs-on: macos-14  # macos-14 is arm64
+  # macos 14 is M1
+  build_wheel_macos_14:
+    runs-on: macos-14 
     strategy:
       matrix:
         python: [3.11]    

.github/workflows/build-wheels-push.yml

@@ -49,7 +49,7 @@ jobs:
           - [ubuntu-24.04, musllinux_x86_64] # No OpenBlas, no test
           - [ubuntu-24.04, musllinux_i686]
           - [ubuntu-24.04-arm, musllinux_aarch64]
-          - [macos-15-intel, macosx_x86_64]
+          - [macos-13, macosx_x86_64]
           - [macos-14, macosx_arm64]
           - [windows-2022, win_amd64]
           - [windows-2022, win32]

.github/workflows/build-wheels.yml

@@ -38,7 +38,7 @@ jobs:
           - [ubuntu-24.04, musllinux_x86_64] # No OpenBlas, no test
           - [ubuntu-24.04, musllinux_i686]
           - [ubuntu-24.04-arm, musllinux_aarch64]
-          - [macos-15-intel, macosx_x86_64]
+          - [macos-13, macosx_x86_64]
           - [macos-14, macosx_arm64]
           - [windows-2022, win_amd64]
           - [windows-2022, win32]

.github/workflows/test-fortran-macos.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   fast_build_release:
-    runs-on: [macos-15-intel]
+    runs-on: [macos-13]
 
 
     steps:

.github/workflows/test-nuget-macos.yml

@@ -7,8 +7,9 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build_macos_intel:
-    runs-on: macos-15-intel
+  # macos 13 is Intel
+  build_macos_13:
+    runs-on: macos-13
     # strategy:
       # matrix:
       #   python: [3.11]
@@ -54,8 +55,9 @@ jobs:
           dotnet run
 
             
-  build_macos_arm:
-    runs-on: macos-14  # macos-14 is arm64
+  # macos 14 is M1
+  build_macos_14:
+    runs-on: macos-14 
     steps:
       - uses: actions/checkout@v4
       - name: Build HiGHS

.github/workflows/test-nuget-package.yml

@@ -7,8 +7,9 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build_macos_intel:
-    runs-on: macos-15-intel
+  # macos 13 is Intel
+  build_macos_13:
+    runs-on: macos-13
     # strategy:
       # matrix:
       #   python: [3.11]
@@ -55,8 +56,9 @@ jobs:
 
 
             
-  build_macos_arm:
-    runs-on: macos-14  # macos-14 is arm64
+  # macos 14 is M1
+  build_macos_14:
+    runs-on: macos-14 
     steps:
       - uses: actions/checkout@v4
       - name: Build HiGHS