gromacs-2021.x-github.patch

diff --git a/.github/workflows/build_cmake.yml b/.github/workflows/build_cmake.yml
index c41e123e94..178268eafd 100644
--- a/.github/workflows/build_cmake.yml
+++ b/.github/workflows/build_cmake.yml
@@ -17,7 +17,7 @@ jobs:
       matrix:
         config:
         - {
-            name: "Windows 2019 MSVC", artifact: "Windows-MSVC.7z",
+            name: "Windows Latest MSVC", artifact: "Windows-MSVC.7z",
             os: windows-2019,
             cc: "cl", cxx: "cl",
             environment_script: "C:/Program Files (x86)/Microsoft Visual Studio/2019/Enterprise/VC/Auxiliary/Build/vcvars64.bat",
@@ -30,8 +30,8 @@ jobs:
             gpu_var: "Off"
           }
         - {
-            name: "macOS Latest gcc with OpenCL", artifact: "macOS-gcc-OpenCL.7z",
-            os: macos-latest,
+            name: "macOS 11 gcc with OpenCL", artifact: "macOS-gcc-OpenCL.7z",
+            os: macos-11, # Don't upgrade to macOS 12, see Issue #4646
             cc: "gcc-10", cxx: "g++-10",
             gpu_var: "OpenCL"