diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 82085e8..e55f9c0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,6 +20,11 @@ on:
         required: false
         default: false
         type: boolean
+      skip_build:
+        description: "Skip build and use local image (for local testing with act)"
+        required: false
+        default: false
+        type: boolean
 
 jobs:
   # ============================================
@@ -121,6 +126,7 @@ jobs:
     name: Integration Tests
     runs-on: ubuntu-latest
     needs: build-test-image
+    if: ${{ !inputs.skip_build }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -146,10 +152,50 @@ jobs:
           sudo ./install.sh /usr/local
 
       - name: Run integration tests
-        env:
-          CI: true
         run: bats tests/integration/
 
+  integration-tests-local:
+    name: Integration Tests (Local Image)
+    runs-on: ubuntu-latest
+    if: ${{ inputs.skip_build }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Verify Docker image exists
+        run: |
+          echo "Checking for locally-built Docker image..."
+          if docker images | grep -q "jmcombs/powershell.*latest"; then
+            echo "✅ Found jmcombs/powershell:latest"
+            docker images | grep powershell
+          else
+            echo "❌ Error: jmcombs/powershell:latest not found"
+            echo ""
+            echo "Please build the image first:"
+            echo "  ./scripts/build-local-arm64.sh"
+            exit 1
+          fi
+
+      - name: Install bats-core
+        run: |
+          git clone https://github.com/bats-core/bats-core.git /tmp/bats-core
+          cd /tmp/bats-core
+          sudo ./install.sh /usr/local
+
+      - name: Run integration tests
+        run: bats tests/integration/
+
+      - name: Test summary
+        if: always()
+        run: |
+          echo ""
+          echo "================================================"
+          echo "Integration Tests Complete"
+          echo "================================================"
+          echo ""
+          echo "Image tested: jmcombs/powershell:latest"
+          docker images | grep powershell || true
+
   # ============================================
   # Stage 4: Publish (only on main, after tests)
   # ============================================
@@ -157,8 +203,14 @@ jobs:
   publish:
     name: Build and Publish
     runs-on: ubuntu-latest
-    needs: integration-tests
-    if: github.ref == 'refs/heads/main' && github.event_name != 'pull_request'
+    needs: [integration-tests, integration-tests-local]
+    if: |
+      always() &&
+      github.ref == 'refs/heads/main' &&
+      github.event_name != 'pull_request' &&
+      !inputs.skip_build &&
+      (needs.integration-tests.result == 'success' || needs.integration-tests.result == 'skipped') &&
+      (needs.integration-tests-local.result == 'success' || needs.integration-tests-local.result == 'skipped')
     permissions:
       contents: write
     steps:
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 4fde587..146d5c6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -32,24 +32,27 @@ This project maintains LTS versions of PowerShell Core and .NET Core in Linux co
 ### Local Development
 
 1. **Clone the repository**:
+
    ```bash
    git clone https://github.com/jmcombs/powershell.git
    cd powershell
    ```
 
 2. **Install testing dependencies**:
+
    ```bash
    # Install bats-core for testing
    git clone https://github.com/bats-core/bats-core.git
    cd bats-core && sudo ./install.sh /usr/local
    cd .. && rm -rf bats-core
-   
+
    # Install shellcheck for script validation
    sudo apt-get install shellcheck  # Ubuntu/Debian
    brew install shellcheck          # macOS
    ```
 
 3. **Make scripts executable**:
+
    ```bash
    chmod +x scripts/*.sh
    ```
@@ -60,16 +63,12 @@ This project uses a comprehensive testing strategy with multiple test types:
 
 ### Test Structure
 
-```
+```text
 tests/
 ├── test_helper.bash          # Common test utilities and setup
-├── mocks/                    # Mock data for testing
-│   ├── dotnet_releases_index.json
-│   ├── dotnet_releases.json
-│   └── powershell_release.json
-├── unit/                     # Unit tests with mocked dependencies
+├── unit/                     # Offline unit tests (no network calls)
 │   └── test_get_net_pwsh_versions.bats
-└── integration/              # Integration tests with real network calls
+└── integration/              # Integration tests with live network calls
     └── test_script_integration.bats
 ```
 
@@ -90,17 +89,25 @@ bats tests/unit/test_get_net_pwsh_versions.bats
 bats -t tests/
 ```
 
+### Local Testing on Apple Silicon
+
+For developers using Apple Silicon (M-series) Macs:
+
+- **Automated build and test**: Run `./scripts/build-local-arm64.sh` to build the Docker image natively for ARM64 and automatically run all integration tests using `act`
+- **Why this is needed**: The main CI workflow builds for AMD64 (x86_64), which causes QEMU emulation issues on Apple Silicon. The build script uses a consolidated workflow with `skip_build=true` to test against locally-built ARM64 images
+- **Manual testing**: After building, run `act workflow_dispatch --pull=false --input skip_build=true -j integration-tests-local` to execute integration tests independently
+
 ### Test Categories
 
-1. **Unit Tests**: Test individual functions with mocked dependencies
+1. **Unit Tests**: Test individual helper functions and local behavior
    - Fast execution
    - No network dependencies
-   - Test edge cases and error conditions
+   - Validate script structure, env-file helpers, and version format logic
 
-2. **Integration Tests**: Test complete workflows with real API calls
+2. **Integration Tests**: Test complete workflows with live API calls and the built container image
    - Slower execution
-   - Require network access
-   - Test real-world scenarios
+   - Require network access and Docker
+   - Validate real-world .NET and PowerShell LTS discovery and build args
 
 3. **Script Validation**: Static analysis and syntax checking
    - Shellcheck for bash script quality
@@ -111,19 +118,19 @@ bats -t tests/
 
 When adding new functionality:
 
-1. **Write unit tests first** for new functions
-2. **Add integration tests** for end-to-end workflows
-3. **Update mock data** if API responses change
-4. **Test error conditions** and edge cases
+1. **Write unit tests first** for new helper functions and local behavior
+2. **Add integration tests** for end-to-end workflows that depend on external services
+3. **Test error conditions** and edge cases, especially around network failures and malformed responses
 
 Example test structure:
+
 ```bash
 @test "descriptive test name" {
     # Arrange: Set up test conditions
-    
+
     # Act: Execute the code being tested
     run your_function_or_command
-    
+
     # Assert: Verify the results
     [ "$status" -eq 0 ]
     [[ "$output" =~ "expected pattern" ]]
@@ -141,7 +148,7 @@ Example test structure:
 - Use meaningful function and variable names
 - Add comments for complex logic
 
-### Testing
+### Test Guidelines
 
 - Use descriptive test names that explain what is being tested
 - Group related tests in the same file
@@ -153,6 +160,7 @@ Example test structure:
 ### Branch Naming
 
 Use descriptive branch names with prefixes:
+
 - `feature/description` - New features
 - `fix/description` - Bug fixes
 - `test/description` - Test improvements
@@ -161,7 +169,8 @@ Use descriptive branch names with prefixes:
 ### Commit Messages
 
 Follow conventional commit format:
-```
+
+```text
 type(scope): description
 
 Longer explanation if needed
@@ -197,6 +206,7 @@ Types: `feat`, `fix`, `test`, `docs`, `ci`, `refactor`
 ### Bug Reports
 
 Use the bug report template and include:
+
 - Clear description of the issue
 - Steps to reproduce
 - Expected vs actual behavior
@@ -206,6 +216,7 @@ Use the bug report template and include:
 ### Feature Requests
 
 Use the feature request template and include:
+
 - Clear description of the proposed feature
 - Use case and motivation
 - Possible implementation approach
diff --git a/scripts/build-local-arm64.sh b/scripts/build-local-arm64.sh
new file mode 100755
index 0000000..7c066d7
--- /dev/null
+++ b/scripts/build-local-arm64.sh
@@ -0,0 +1,89 @@
+#!/bin/bash
+set -e
+
+# Build Docker image locally for ARM64 (Apple Silicon)
+# This script builds the image natively without QEMU emulation issues
+
+echo "🔧 Building PowerShell Docker image for ARM64 (Apple Silicon)..."
+
+# Get version information
+echo "📋 Getting .NET and PowerShell versions..."
+chmod +x ./scripts/get-net-pwsh-versions.sh
+./scripts/get-net-pwsh-versions.sh
+
+# Source the environment variables
+if [ -f /tmp/env_vars ]; then
+    echo "✅ Loading build arguments from /tmp/env_vars"
+    export $(cat /tmp/env_vars | xargs)
+else
+    echo "❌ Error: /tmp/env_vars not found"
+    exit 1
+fi
+
+# Build the image for ARM64
+echo "🐳 Building Docker image for linux/arm64..."
+docker buildx build \
+    --platform linux/arm64 \
+    --build-arg NET_RUNTIME_LTS_VERSION="${NET_RUNTIME_LTS_VERSION}" \
+    --build-arg NET_RUNTIME_URL_arm="${NET_RUNTIME_URL_arm}" \
+    --build-arg NET_RUNTIME_PACKAGE_NAME_arm="${NET_RUNTIME_PACKAGE_NAME_arm}" \
+    --build-arg NET_RUNTIME_URL_arm64="${NET_RUNTIME_URL_arm64}" \
+    --build-arg NET_RUNTIME_PACKAGE_NAME_arm64="${NET_RUNTIME_PACKAGE_NAME_arm64}" \
+    --build-arg NET_RUNTIME_URL_x64="${NET_RUNTIME_URL_x64}" \
+    --build-arg NET_RUNTIME_PACKAGE_NAME_x64="${NET_RUNTIME_PACKAGE_NAME_x64}" \
+    --build-arg PWSH_LTS_URL_arm32="${PWSH_LTS_URL_arm32}" \
+    --build-arg PWSH_LTS_PACKAGE_NAME_arm32="${PWSH_LTS_PACKAGE_NAME_arm32}" \
+    --build-arg PWSH_LTS_URL_arm64="${PWSH_LTS_URL_arm64}" \
+    --build-arg PWSH_LTS_PACKAGE_NAME_arm64="${PWSH_LTS_PACKAGE_NAME_arm64}" \
+    --build-arg PWSH_LTS_URL_x64="${PWSH_LTS_URL_x64}" \
+    --build-arg PWSH_LTS_PACKAGE_NAME_x64="${PWSH_LTS_PACKAGE_NAME_x64}" \
+    --build-arg PWSH_LTS_VERSION="${PWSH_LTS_VERSION}" \
+    --build-arg PWSH_LTS_MAJOR_VERSION="${PWSH_LTS_MAJOR_VERSION}" \
+    --load \
+    --tag jmcombs/powershell:test \
+    --tag jmcombs/powershell:latest \
+    .
+
+echo ""
+echo "✅ Build complete!"
+echo ""
+echo "📦 Tagged images:"
+echo "   - jmcombs/powershell:test"
+echo "   - jmcombs/powershell:latest"
+echo ""
+
+# Tag the image as 'latest' for integration tests
+echo "🏷️  Tagging image as latest for integration tests..."
+docker tag jmcombs/powershell:test jmcombs/powershell:latest
+
+# Run integration tests with act using the main CI workflow with skip_build input
+echo "🧪 Running integration tests with act..."
+echo ""
+
+if command -v act &> /dev/null; then
+    # Use the main ci.yml workflow with skip_build=true to bypass the build job
+    # This runs the integration-tests-local job which assumes the image already exists
+    act workflow_dispatch --pull=false --input skip_build=true -j integration-tests-local
+    TEST_EXIT_CODE=$?
+
+    echo ""
+    if [ $TEST_EXIT_CODE -eq 0 ]; then
+        echo "✅ All integration tests passed!"
+    else
+        echo "❌ Integration tests failed with exit code: $TEST_EXIT_CODE"
+        exit $TEST_EXIT_CODE
+    fi
+else
+    echo "⚠️  Warning: 'act' is not installed. Skipping integration tests."
+    echo ""
+    echo "   Install act with:"
+    echo "   brew install act"
+    echo ""
+    echo "   To run tests manually:"
+    echo "   act workflow_dispatch --pull=false --input skip_build=true -j integration-tests-local"
+fi
+
+echo ""
+echo "🚀 To run the container:"
+echo "   docker run -it jmcombs/powershell:latest"
+