diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 36611f05..a2953db7 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -10,27 +10,33 @@ on:
 jobs:
 
   check-build-test:
-    runs-on: macos-12
+    runs-on: macos-15
 
     steps:
 
     - name: Install Tools
       run: |
-        brew tap a7ex/homebrew-formulae
-        brew install xcbeautify sonar-scanner findsimulator 
+        brew install swiftlint sonar-scanner
       env:
         HOMEBREW_NO_INSTALL_CLEANUP: 1
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     
     - name: Select Xcode
-      run: sudo xcode-select -s /Applications/Xcode_14.1.app/Contents/Developer
+      run: sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
+
+    - uses: actions/cache@v4
+      with:
+        path: .build
+        key: ${{ runner.os }}-${{ env.MD_APPLE_SDK_ROOT }}-spm-${{ hashFiles('./Package.resolved') }}
+        restore-keys: |
+          ${{ runner.os }}-${{ env.MD_APPLE_SDK_ROOT }}-spm-
 
     - name: SwiftLint
       run: |
-        mkdir .build
+        mkdir -p .build
         swiftlint lint --reporter json > .build/swiftlint.json
 
     - name: Build/Test
@@ -39,7 +45,7 @@ jobs:
     - name: Convert Coverage
       run: xcrun llvm-cov show -instr-profile=.build/debug/codecov/default.profdata .build/debug/SundayPackageTests.xctest/Contents/MacOS/SundayPackageTests > .build/coverage.report
 
-    - name: Sonar Scanner
+    - name: SonarCloud Scan
       run: sonar-scanner
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -48,7 +54,7 @@ jobs:
 
   build-test:
   
-    runs-on: macos-12
+    runs-on: macos-15
 
     needs: [check-build-test]
 
@@ -60,21 +66,20 @@ jobs:
 
     - name: Install Tools
       run: |
-        brew tap a7ex/homebrew-formulae
-        brew install xcbeautify findsimulator
+        brew install xcbeautify
       env:
         HOMEBREW_NO_INSTALL_CLEANUP: 1
       
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     
     - name: Select Xcode
-      run: sudo xcode-select -s /Applications/Xcode_14.1.app/Contents/Developer
+      run: sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
 
     - name: Build/Test
       run: make build-test-${{ matrix.platform }}
 
     - name: Report Test Results
-      uses: kishikawakatsumi/xcresulttool@v1
+      uses: slidoapp/xcresulttool@main
       if: always()
       with:
           title: Test Results ${{ matrix.platform }}
diff --git a/.github/workflows/publish-docs.yml b/.github/workflows/publish-docs.yml
index 64d97d33..2f47e98d 100644
--- a/.github/workflows/publish-docs.yml
+++ b/.github/workflows/publish-docs.yml
@@ -15,13 +15,13 @@ jobs:
 
   build:
     
-    runs-on: macos-12
+    runs-on: macos-15
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Select Xcode
-      run: sudo xcode-select -s /Applications/Xcode_14.1.app/Contents/Developer
+      run: sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
 
     - run: mkdir -p docs
 
@@ -39,7 +39,7 @@ jobs:
       run: tar -czf docs.tar.gz docs
 
     - name: Upload Docs Archive
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: docs-${{ github.ref_name }}
         path: docs.tar.gz
@@ -50,10 +50,10 @@ jobs:
     needs: [ build ]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Download Docs Archive
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: docs-${{ github.ref_name }}
         path: '.'
diff --git a/.github/workflows/publish-release.yml b/.github/workflows/publish-release.yml
index 0175a032..68568a24 100644
--- a/.github/workflows/publish-release.yml
+++ b/.github/workflows/publish-release.yml
@@ -15,13 +15,13 @@ jobs:
 
   build:
     
-    runs-on: macos-12
+    runs-on: macos-15
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Select Xcode
-      run: sudo xcode-select -s /Applications/Xcode_14.1.app/Contents/Developer
+      run: sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
 
     - run: mkdir -p docs
 
@@ -39,7 +39,7 @@ jobs:
       run: tar -czf docs.tar.gz docs
 
     - name: Upload Docs Archive
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: docs-${{ github.ref_name }}
         path: docs.tar.gz
@@ -50,10 +50,10 @@ jobs:
     needs: [ build ]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Download Docs Archive
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: docs-${{ github.ref_name }}
         path: '.'
@@ -69,10 +69,10 @@ jobs:
 
     - name: Check Version Format in Tag
       id: version
-      uses: nowsprinting/check-version-format-action@v3
+      uses: nowsprinting/check-version-format-action@v4
 
     - name: Create GitHub Release
-      uses: softprops/action-gh-release@v1
+      uses: softprops/action-gh-release@v2
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with: