USB streaming
Connect with a cable and go. No Wi-Fi network, hotspot, or wireless pairing required.
turn your iPhone into a second screen for your Mac
A true extended macOS display with low-latency USB streaming — no Wi-Fi needed. Built first for iPhone Duo, with support for compatible iPhones.
download for macfree · macOS + iOS
Get the iPhone appfor iPhone Duo & iPhone
usb-c · extended display
everything a second screen should be
Low latency
Stream your Mac display over a direct USB connection. Actual latency varies by device, connection, and quality settings.
Touch-to-mouse input
Tap to click and drag to move the cursor, with two-finger scroll that feels native.
Quality presets
Choose Best, Balanced, or Fast to trade image quality for responsiveness.
Menu bar stats
Live latency and frame rate sit in your Mac's menu bar. Click the icon for per‑device stats, updated every second.
True extended display
Not a mirror — a real extra desktop for macOS, with portrait rotation for docs, chats, and code.
three steps, one cable
- 01
Install
Run the Mac companion app and install Duo Display on your iPhone.
- 02
Plug in
Connect your iPhone to your Mac with a USB cable.
- 03
Extend
macOS sees a new display. Arrange it, rotate it, pick a preset — done.
get duo display
Free, from myduodisplay.com.