diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7a2ff916b..db4d02fcb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -117,10 +117,10 @@ jobs:
               stdlib: libc++, install: 'clang-18 libc++-18-dev libc++abi-18-dev', ccache_key: "tsan" }
 
           # OSX, clang
-          - { compiler: clang, cxxstd: '11,14,17,2a',    os: 'macos-12', sanitize: yes, ccache_key: "san1" }
-          - { compiler: clang, cxxstd: '11,14,17,2a',    os: 'macos-12', thread-sanitize: yes, targets: 'libs/unordered/test//cfoa_tests', ccache_key: "tsan" }
-          - { compiler: clang, cxxstd: '11,14,17,20,2b', os: 'macos-13' }
+          - { compiler: clang, cxxstd: '11,14,17,20,2b', os: 'macos-13', sanitize: yes, ccache_key: "san1" }
+          - { compiler: clang, cxxstd: '11,14,17,20,2b', os: 'macos-13', thread-sanitize: yes, targets: 'libs/unordered/test//cfoa_tests', ccache_key: "tsan" }
           - { compiler: clang, cxxstd: '11,14,17,20,2b', os: 'macos-14' }
+          - { compiler: clang, cxxstd: '11,14,17,20,2b', os: 'macos-15' }
 
     timeout-minutes: 360
     # posix (gcc-12 w/ sanitizers is taking longer than 210 minutes