Use caffeinate on macOS to prevent system sleep during the pull

scripts/playground-docker.sh

@@ -246,7 +246,14 @@ if [[ "$USE_CLOUD" == "false" && "$COMPUTER_TYPE" == "macos" ]]; then
     
     if [[ $CONTINUE =~ ^[Yy]$ ]]; then
       print_info "Pulling macOS CUA image (this may take a while)..."
-      lume pull macos-sequoia-cua:latest
+      
+      # Use caffeinate on macOS to prevent system sleep during the pull
+      if command -v caffeinate &> /dev/null; then
+        print_info "Using caffeinate to prevent system sleep during download..."
+        caffeinate -i lume pull macos-sequoia-cua:latest
+      else
+        lume pull macos-sequoia-cua:latest
+      fi
     else
       print_error "Installation cancelled."
       exit 1
@@ -296,4 +303,4 @@ print_success "C/ua Computer-Use Agent UI is now running at http://localhost:786
 echo
 echo "🌐 Open your browser and go to: http://localhost:7860/"
 echo
-"$DEMO_DIR/start_ui.sh"
+"$DEMO_DIR/start_ui.sh"