diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5cc6c3515e..910880b206 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        runs-on: [ubuntu-20.04, windows-2022, macos-latest]
+        runs-on: [ubuntu-20.04, windows-2022, macos-13]
         python:
         - '3.6'
         - '3.9'
@@ -1118,8 +1118,8 @@ jobs:
         run: git clean -fdx
 
   macos_brew_install_llvm:
-    name: "macos-latest • brew install llvm"
-    runs-on: macos-latest
+    name: "macos-13 • brew install llvm"
+    runs-on: macos-13
 
     env:
       # https://apple.stackexchange.com/questions/227026/how-to-install-recent-clang-with-homebrew
diff --git a/.github/workflows/configure.yml b/.github/workflows/configure.yml
index 65cc54f306..0e55a07954 100644
--- a/.github/workflows/configure.yml
+++ b/.github/workflows/configure.yml
@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        runs-on: [ubuntu-20.04, macos-latest, windows-latest]
+        runs-on: [ubuntu-20.04, macos-13, windows-latest]
         arch: [x64]
         cmake: ["3.26"]
 
@@ -37,7 +37,7 @@ jobs:
           arch: x64
           cmake: "3.29"
 
-        - runs-on: macos-latest
+        - runs-on: macos-13
           arch: x64
           cmake: "3.7"