diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
index 0a5e394f5..58b911344 100644
--- a/.azure-pipelines.yml
+++ b/.azure-pipelines.yml
@@ -53,9 +53,9 @@ jobs:
         parameters:
           cxxver: '14'
 
-  - job: 'macos1015_xcode11_cmake'
+  - job: 'macos11_xcode13_cmake'
     pool:
-      vmImage: 'macOS-10.15'
+      vmImage: 'macOS-11'
     steps:
       - script: which clang++ && clang++ --version
         displayName: 'Check clang'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a49372079..9d4760dae 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -79,7 +79,7 @@ jobs:
             os: ubuntu-20.04
           - toolset: clang
             cxxstd: "14,17"
-            os: macos-10.15
+            os: macos-11
 
     runs-on: ${{matrix.os}}