chore: Run "latest" Mac builds on macOS 26 (#2019)

Author: jbelkins

.github/workflows/continuous-integration.yml

@@ -19,7 +19,7 @@ jobs:
         # This matrix runs tests on iOS sim & Mac, on oldest & newest supported Xcodes
         runner:
           - macos-14
-          - macos-15
+          - macos-26
         xcode:
           - Xcode_15.2
           - Xcode_26.0
@@ -36,7 +36,7 @@ jobs:
           - runner: macos-14
             xcode: Xcode_26.0
           # Don't run new macOS with old Xcode
-          - runner: macos-15
+          - runner: macos-26
             xcode: Xcode_15.2
           # Don't run old simulators with new Xcode
           - destination: 'platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (at 1080p)'
@@ -55,27 +55,6 @@ jobs:
     steps:
       - name: Configure Xcode
         run: sudo xcode-select -s /Applications/${{ matrix.xcode }}.app
-      - name: Install visionOS sim if needed
-        if: ${{ contains(matrix.destination, 'platform=visionOS Simulator') }}
-        run: |
-          sudo xcodebuild -runFirstLaunch
-          xcrun simctl list > /dev/null
-          sudo xcodebuild -downloadPlatform visionOS
-          sudo xcodebuild -runFirstLaunch
-      - name: Install iOS 26 sim if needed
-        if: ${{ contains(matrix.xcode, '26') && contains(matrix.destination, 'platform=iOS Simulator') }}
-        run: |
-          sudo xcodebuild -runFirstLaunch
-          xcrun simctl list > /dev/null
-          sudo xcodebuild -downloadPlatform iOS
-          sudo xcodebuild -runFirstLaunch
-      - name: Install tvOS 26 sim if needed
-        if: ${{ contains(matrix.xcode, '26') && contains(matrix.destination, 'platform=tvOS Simulator') }}
-        run: |
-          sudo xcodebuild -runFirstLaunch
-          xcrun simctl list > /dev/null
-          sudo xcodebuild -downloadPlatform tvOS
-          sudo xcodebuild -runFirstLaunch
       - name: Checkout aws-sdk-swift
         uses: actions/checkout@v4
         with:

.github/workflows/integration-test.yml

@@ -24,7 +24,7 @@ jobs:
         # This matrix runs tests on iOS sim & Mac, on oldest & newest supported Xcodes
         runner:
           - macos-14
-          - macos-15
+          - macos-26
         xcode:
           - Xcode_15.2
           - Xcode_26.0
@@ -41,7 +41,7 @@ jobs:
           - runner: macos-14
             xcode: Xcode_26.0
           # Don't run new macOS with old Xcode
-          - runner: macos-15
+          - runner: macos-26
             xcode: Xcode_15.2
           # Don't run old simulators with new Xcode
           - destination: 'platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (at 1080p)'
@@ -60,27 +60,6 @@ jobs:
     steps:
       - name: Configure Xcode
         run: sudo xcode-select -s /Applications/${{ matrix.xcode }}.app
-      - name: Install visionOS sim if needed
-        if: ${{ contains(matrix.destination, 'platform=visionOS Simulator') }}
-        run: |
-          sudo xcodebuild -runFirstLaunch
-          xcrun simctl list > /dev/null
-          sudo xcodebuild -downloadPlatform visionOS
-          sudo xcodebuild -runFirstLaunch
-      - name: Install iOS 26 sim if needed
-        if: ${{ contains(matrix.xcode, '26') && contains(matrix.destination, 'platform=iOS Simulator') }}
-        run: |
-          sudo xcodebuild -runFirstLaunch
-          xcrun simctl list > /dev/null
-          sudo xcodebuild -downloadPlatform iOS
-          sudo xcodebuild -runFirstLaunch
-      - name: Install tvOS 26 sim if needed
-        if: ${{ contains(matrix.xcode, '26') && contains(matrix.destination, 'platform=tvOS Simulator') }}
-        run: |
-          sudo xcodebuild -runFirstLaunch
-          xcrun simctl list > /dev/null
-          sudo xcodebuild -downloadPlatform tvOS
-          sudo xcodebuild -runFirstLaunch
       - name: Configure AWS Credentials for Integration Tests
         uses: aws-actions/configure-aws-credentials@v4
         with: