Guide · Phone as a Second Monitor

Use your Android phone as a real second monitor

Not a mirrored screen — an actual, arrangeable macOS display that happens to be rendered on your phone. Drag windows onto it, extend your desktop, no dock or cable gymnastics required.

How this is different from screen mirroring

Most "use your phone as a monitor" tools mirror or extend by capturing what's already on one of your Mac's screens and copying it to the phone. PhoneDesk works the other way: it asks macOS for a brand new virtual display — the kind that shows up in System Settings → Displays next to your real monitors — and streams that to your phone.

Because it's a real display as far as macOS is concerned, it behaves like one: windows can be dragged onto it, apps can live there permanently, and it disappears cleanly (no reboot, no leftover display) the moment you stop the session.

How to set it up

  1. 1

    Connect your phone to PhoneDesk

    USB debugging on, then plug in over USB or pair wirelessly with a QR code.

  2. 2

    Open the menu bar dropdown

    Select your device from the list of connected phones.

  3. 3

    Choose "Use as Second Display"

    PhoneDesk creates the virtual display and starts streaming — your phone shows it full screen automatically.

  4. 4

    Arrange it in Displays settings

    Drag it into position relative to your Mac's built-in screen, just like any external monitor.

Tips for the sharpest picture

  • Turn on "Show all resolutions": System Settings → Displays → select PhoneDesk Display → hold Option and pick the highest resolution listed.
  • USB is sharper than Wi-Fi: Wi-Fi automatically drops to a lower resolution and bitrate to stay smooth on variable network conditions — for the sharpest possible image, use USB.
  • Older phones still work: Android 9+ is supported, since the Mac does the heavy lifting — the phone only needs to decode and display video, not run desktop mode itself.

What makes it usable in real work

A real display, not a mirror

Appears in Displays settings, accepts dragged windows, extends your desktop.

Touch keeps up

Low-latency streaming with responsive cursor and touch — not a laggy screenshare.

USB or wireless

Full quality over USB, an automatically tuned stream over Wi-Fi.

$25 one-time, lifetime license

No subscription. 14-day no-questions refund.

See full feature list →Want the reverse — your phone's desktop mode on the Mac? Samsung DEX guide →Also send files from your phone to your Mac →Just want a basic screen cast instead? Cast phone to laptop guide →

FAQ

Is this actually a second monitor, or just mirroring?

A real second monitor. PhoneDesk creates an actual macOS virtual display — it shows up in System Settings → Displays like any other screen, and you can drag windows onto it, extend your desktop across it, or set it up in Stage Manager. It's not a mirror of your Mac's existing screen.

Do I need any extra hardware or a dock?

No. No dock, no HDMI, no capture card. PhoneDesk streams the display to your phone over the same USB or Wi-Fi connection it already uses for desktop mode.

Does it work wirelessly?

Yes — over Wi-Fi as well as USB. Wi-Fi automatically drops to a lower resolution and bitrate to keep the picture smooth, since it has less bandwidth headroom than a USB connection.

Which phones does this work with?

Android 9 and later. Unlike desktop mode (which needs a "desk-eligible" phone like a Galaxy S/Z or Pixel), the second-display feature works on a much wider range of Android phones — the Mac does the display work, so the phone just needs to decode and show video.

Can I use desktop mode and second display at the same time?

Yes — that's "combined mode." Your phone's own desktop session runs on the Mac while the Mac's second screen streams back to the phone, using the full phone screen with no overlay either way.

How sharp is the picture?

For the sharpest image, open System Settings → Displays, turn on "Show all resolutions," and pick the highest one listed for PhoneDesk Display. Video and cursor movement stay smooth on both USB and Wi-Fi.