diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0d41d9c..d4bdfc6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -310,15 +310,15 @@ jobs:
               - libc++-15-dev
               - libc++abi-15-dev
 
-          - toolset: clang
-            cxxstd: "03,11,14,17,2a"
-            os: macos-11
           - 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
 
     timeout-minutes: 45
     runs-on: ${{matrix.os}}
@@ -611,9 +611,9 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-11
           - os: macos-12
           - os: macos-13
+          - os: macos-14
 
     runs-on: ${{matrix.os}}
     timeout-minutes: 10
@@ -678,9 +678,9 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-11
           - os: macos-12
           - os: macos-13
+          - os: macos-14
 
     runs-on: ${{matrix.os}}
     timeout-minutes: 10
@@ -755,9 +755,9 @@ jobs:
         include:
           - os: ubuntu-20.04
           - os: ubuntu-22.04
-          - os: macos-11
           - os: macos-12
           - os: macos-13
+          - os: macos-14
 
     runs-on: ${{matrix.os}}
     timeout-minutes: 20
diff --git a/include/boost/core/type_name.hpp b/include/boost/core/type_name.hpp
index c5cbbbd..81e00c2 100644
--- a/include/boost/core/type_name.hpp
+++ b/include/boost/core/type_name.hpp
@@ -346,6 +346,8 @@ template<> struct tn_holder<boost::uint128_type>
 
 #endif
 
+#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+
 template<> struct tn_holder<wchar_t>
 {
     static std::string type_name( std::string const& suffix )
@@ -354,6 +356,8 @@ template<> struct tn_holder<wchar_t>
     }
 };
 
+#endif
+
 #if !defined(BOOST_NO_CXX11_CHAR16_T)
 
 template<> struct tn_holder<char16_t>