To use your iPhone 16 Pro Max as a mouse to control your MacBook Pro M4, you can utilize a free app called "Remote Mouse." Here’s how to set it up on both devices:

Setup on Your iPhone

1. Download the App: Go to the iOS App Store and download the "Remote Mouse" app.
2. Launch the App: Open the app once it has finished downloading.
3. Allow Permissions: When prompted, allow the app to connect via Bluetooth and WiFi.

Setup on Your Mac

1. Download the App: Visit the Mac App Store and download the "Remote Mouse" app.
2. Launch the App: Open the app on your Mac.
3. Enable Accessibility: Follow the instructions to enable the app in your Mac's Accessibility settings.
4. Auto Start: Click on the app icon in the toolbar and select "Auto Start" to ensure it runs in the background.

Connecting Your Devices

• Ensure both your iPhone and Mac are connected to the same WiFi network for optimal performance.
• In the Remote Mouse app on your iPhone, select your Mac from the "Select a Computer" menu. You can also add devices by entering an IP address or scanning a QR code displayed on your Mac.

Using Your iPhone as a Mouse

Once connected, you can use your iPhone to control your Mac. The app allows you to:

• Use Gestures: Similar to a trackpad, you can swipe and tap to navigate.
• Access Keyboard: Tap the keyboard icon to bring up your iPhone's keyboard for typing on your Mac.
• Launch Apps: Tap the file icon to quickly access and launch apps from your Mac's Dock.

Additional Features

While most basic functionalities are free, some advanced features may require a subscription. You can try these features with a seven-day free trial before deciding to subscribe.

Using your iPhone as a wireless mouse can enhance your productivity, allowing you to control your Mac from a distance with ease.