diff --git a/.clang-format b/.clang-format
index c423ca27..a111c83a 100644
--- a/.clang-format
+++ b/.clang-format
@@ -1,4 +1,11 @@
-# the official .clang-format style for https://github.com/taocpp
+# The Art of C++
+# https://github.com/taocpp
+
+# Copyright (c) 2016-2023 Dr. Colin Hirsch and Daniel Frey
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
+
+# This is our official .clang-format style for https://github.com/taocpp
 #
 # clang-format -i -style=file $(find . -name '[^.]*.[hc]pp')
 
diff --git a/.clang-tidy b/.clang-tidy
index 8b5f4236..66c04fee 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -1,7 +1,7 @@
 # The Art of C++
-# https://github.com/taocpp/json
+# https://github.com/taocpp
 
-# Copyright (c) 2016-2023 Daniel Frey
+# Copyright (c) 2016-2023 Dr. Colin Hirsch and Daniel Frey
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index a519ee01..28debd5d 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -70,7 +70,7 @@ jobs:
       with:
         submodules: recursive
 
-    - run: sudo apt-get update
+    - run: sudo apt-get update -y
 
     - run: sudo apt-get install -y ${{ matrix.compiler }}
 
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index c523b22a..f9b728b8 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -15,39 +15,32 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        xcode: ['13', '14']
-        build_type: [Debug, Release]
-
-    runs-on: macos-latest
-
-    steps:
-    - uses: actions/checkout@v3
-      with:
-        submodules: recursive
-
-    - uses: maxim-lobanov/setup-xcode@v1
-      with:
-        xcode-version: ${{ matrix.xcode }}
-
-    - run: cmake -E make_directory build
-
-    - working-directory: build/
-      run: cmake $GITHUB_WORKSPACE
-
-    - working-directory: build/
-      run: cmake --build . --config ${{ matrix.build_type }}
-
-    - working-directory: build/
-      run: ctest --config ${{ matrix.build_type }} --output-on-failure
-
-  xcode-old:
-    strategy:
-      fail-fast: false
-      matrix:
-        xcode: ['11', '12']
-        build_type: [Debug, Release]
-
-    runs-on: macos-11
+        include:
+          - xcode: 11
+            build_type: Debug
+            os: macos-11
+          - xcode: 11
+            build_type: Release
+            os: macos-11
+          - xcode: 12
+            build_type: Debug
+            os: macos-11
+          - xcode: 12
+            build_type: Release
+            os: macos-11
+          - xcode: 13
+            build_type: Debug
+            os: macos-12
+          - xcode: 13
+            build_type: Release
+            os: macos-12
+          - xcode: 14
+            build_type: Debug
+            os: macos-12
+          - xcode: 14
+            build_type: Release
+            os: macos-12
+    runs-on: ${{ matrix.os }}
 
     steps:
     - uses: actions/checkout@v3