diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2a945c9a..15396eb6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -298,12 +298,12 @@ jobs:
             source_keys:
               - "https://apt.llvm.org/llvm-snapshot.gpg.key"
 
-          - toolset: clang
-            cxxstd: "03,11,14,17,20,2b"
-            os: macos-14
           - toolset: clang
             cxxstd: "03,11,14,17,20,2b"
             os: macos-15
+          - toolset: clang
+            cxxstd: "03,11,14,17,20,2b,2c"
+            os: macos-26
 
     timeout-minutes: 180
     runs-on: ${{matrix.os}}
@@ -620,8 +620,8 @@ jobs:
         include:
           - os: ubuntu-22.04
           - os: ubuntu-24.04
-          - os: macos-14
           - os: macos-15
+          - os: macos-26
 
     runs-on: ${{matrix.os}}
 
@@ -666,8 +666,8 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: macos-14
           - os: macos-15
+          - os: macos-26
 
     runs-on: ${{matrix.os}}
 
@@ -724,8 +724,8 @@ jobs:
         include:
           - os: ubuntu-22.04
           - os: ubuntu-24.04
-          - os: macos-14
           - os: macos-15
+          - os: macos-26
 
     runs-on: ${{matrix.os}}
 
@@ -780,8 +780,8 @@ jobs:
         include:
           - os: ubuntu-22.04
           - os: ubuntu-24.04
-          - os: macos-14
           - os: macos-15
+          - os: macos-26
 
     runs-on: ${{matrix.os}}
 
@@ -952,8 +952,8 @@ jobs:
       matrix:
         include:
           - os: ubuntu-24.04
-          - os: macos-14
           - os: macos-15
+          - os: macos-26
 
     runs-on: ${{matrix.os}}