diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9408e6b..2b57bce 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -325,15 +325,15 @@ jobs:
               - libc++-15-dev
               - libc++abi-15-dev
 
-          - toolset: clang
-            cxxstd: "03,11,14,17,20,2b"
-            os: macos-12
           - toolset: clang
             cxxstd: "03,11,14,17,20,2b"
             os: macos-13
           - toolset: clang
             cxxstd: "03,11,14,17,20,2b"
             os: macos-14
+          - toolset: clang
+            cxxstd: "03,11,14,17,20,2b"
+            os: macos-15
 
     timeout-minutes: 45
     runs-on: ${{matrix.os}}
@@ -626,9 +626,10 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-12
+          - os: ubuntu-24.04
           - os: macos-13
           - os: macos-14
+          - os: macos-15
 
     runs-on: ${{matrix.os}}
     timeout-minutes: 10
@@ -693,9 +694,10 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-12
+          - os: ubuntu-24.04
           - os: macos-13
           - os: macos-14
+          - os: macos-15
 
     runs-on: ${{matrix.os}}
     timeout-minutes: 10
@@ -770,9 +772,10 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-12
+          - os: ubuntu-24.04
           - os: macos-13
           - os: macos-14
+          - os: macos-15
 
     runs-on: ${{matrix.os}}
     timeout-minutes: 20