Control Simulator

Control Simulator

Manage iOS/watchOS/tvOS/visionOS simulators - boot, install apps, and control device state.

When to Use

• Need to test an app in the simulator
• Setting up a specific device configuration
• Capturing screenshots or video
• Testing push notifications or location
• Managing multiple simulator devices

Quick Start

List Available Devices

# All devices
xcrun simctl list devices

# Only booted devices
xcrun simctl list devices | grep Booted

# Available device types
xcrun simctl list devicetypes

# Available runtimes (iOS versions)
xcrun simctl list runtimes

Boot and Shutdown

# Boot a device (use device name or UUID)
xcrun simctl boot "iPhone 16"

# Shutdown a device
xcrun simctl shutdown "iPhone 16"

# Shutdown all simulators
xcrun simctl shutdown all

# Open Simulator.app with a device
open -a Simulator --args -CurrentDeviceUDID $(xcrun simctl list devices | grep "iPhone 16" | grep -oE "[A-F0-9-]{36}")

Get Device UUID

# Find UUID for a specific device
xcrun simctl list devices | grep "iPhone 16"
# Output: iPhone 16 (XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX) (Booted)

# Get just the UUID
DEVICE_UUID=$(xcrun simctl list devices available | grep "iPhone 16 Pro (" | head -1 | grep -oE "[A-F0-9-]{36}")
echo $DEVICE_UUID

App Management

Install and Launch

# Install an app (needs .app bundle, not .ipa)
xcrun simctl install booted /path/to/MyApp.app

# Launch an app
xcrun simctl launch booted com.example.myapp

# Launch and wait for debugger
xcrun simctl launch -w booted com.example.myapp

# Launch with arguments
xcrun simctl launch booted com.example.myapp --arg1 value1

Terminate and Uninstall

# Terminate running app
xcrun simctl terminate booted com.example.myapp

# Uninstall app
xcrun simctl uninstall booted com.example.myapp

# List installed apps
xcrun simctl listapps booted

Screenshots and Video

Screenshot

# Capture screenshot (PNG)
xcrun simctl io booted screenshot screenshot.png

# Different formats
xcrun simctl io booted screenshot --type=jpeg screenshot.jpg
xcrun simctl io booted screenshot --type=png screenshot.png

# With mask (device frame)
xcrun simctl io booted screenshot --mask=black screenshot.png

Record Video

# Start recording
xcrun simctl io booted recordVideo output.mov

# Press Ctrl+C to stop recording

# With specific codec
xcrun simctl io booted recordVideo --codec=h264 output.mp4

Location and Push Notifications

Set Location

# Set specific coordinates
xcrun simctl location booted set 37.7749,-122.4194

# Clear location (return to default)
xcrun simctl location booted clear

Send Push Notification

# Create payload file
cat > /tmp/push.json << 'EOF'
{
  "aps": {
    "alert": {
      "title": "Test Notification",
      "body": "Hello from simctl!"
    },
    "badge": 1,
    "sound": "default"
  }
}
EOF

# Send to app
xcrun simctl push booted com.example.myapp /tmp/push.json

Privacy and Permissions

# Grant permission
xcrun simctl privacy booted grant photos com.example.myapp
xcrun simctl privacy booted grant camera com.example.myapp
xcrun simctl privacy booted grant location com.example.myapp

# Revoke permission
xcrun simctl privacy booted revoke photos com.example.myapp

# Reset all permissions
xcrun simctl privacy booted reset all com.example.myapp

Available services: all, calendar, contacts, location, photos, camera, microphone, media-library, motion, reminders, siri

Status Bar Override

# Set perfect status bar for screenshots
xcrun simctl status_bar booted override \
  --time "9:41" \
  --batteryState charged \
  --batteryLevel 100 \
  --cellularMode active \
  --cellularBars 4

# Clear overrides
xcrun simctl status_bar booted clear

Deep Links and URLs

# Open URL in simulator
xcrun simctl openurl booted "https://example.com"

# Test deep links
xcrun simctl openurl booted "myapp://path/to/content"

Clipboard

# Copy text to simulator clipboard
echo "Hello" | xcrun simctl pbcopy booted

# Get text from simulator clipboard
xcrun simctl pbpaste booted

Device Management

Create and Delete

# Create new device
xcrun simctl create "My Test Phone" "iPhone 16" "iOS-18-0"

# Delete device
xcrun simctl delete "My Test Phone"

# Erase device (reset to clean state)
xcrun simctl erase "iPhone 16"

# Clone device
xcrun simctl clone "iPhone 16" "iPhone 16 Copy"

Common Workflows

Fresh Test Environment

# Erase, boot, install, launch
xcrun simctl erase "iPhone 16" && \
xcrun simctl boot "iPhone 16" && \
xcrun simctl install booted MyApp.app && \
xcrun simctl launch booted com.example.myapp

Screenshot with Perfect Status Bar

xcrun simctl status_bar booted override --time "9:41" --batteryState charged --batteryLevel 100 && \
xcrun simctl io booted screenshot --mask=black screenshot.png && \
xcrun simctl status_bar booted clear

Tips

• Use booted as device name to target the currently running simulator
• Device names with spaces need quotes: "iPhone 16 Pro Max"
• UUIDs are more reliable than names for scripting
• xcrun simctl help shows all available commands
• Apps must be built for simulator (x86_64/arm64 simulator slice)

MCP Fallback

For structured data or complex operations:

• simctl_list_devices - JSON list of devices with state
• simctl_device_control - Boot/shutdown/create/delete
• simctl_app_control - Install/launch/terminate
• simctl_screenshot / simctl_record_video - Media capture