Turn the Mac you own into the monitor you don't need to buy.

MacDisplay extends your Mac's display to any other Mac with macOS 11 or later. Over Thunderbolt, Ethernet, or Wi-Fi. No hardware, no account, no cloud. 13 megabytes. €29,99 + VAT. Try it free now.

Download for Mac See how it works
  • macOS 11+
  • 13 MB · notarized
  • Free to try · €29,99 + VAT
Act 01

Plug in a cable.

Thunderbolt, Ethernet, or your local Wi-Fi. MacDisplay picks the fastest path automatically and fails over silently if the network changes.

Act 02

One keyboard shortcut.

Press ⌘ ⌥ M on the source Mac. The receiver Mac shifts into display mode — no menus, no setup wizard, no waiting.

Act 03

Your desktop extends.

More space to work, wherever you are. Drag windows between Macs as if they shared a single graphics card. Independent workspace, native cursor, native resolution.

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The problem

Got an iMac you barely use? A MacBook that needs more screen?

01

Most people already own a Mac sitting on a desk at home, half-asleep, doing almost nothing.

02

And the same people, on the move, work all day on a single 13-inch display that's too small for serious work.

03

The second screen is already in the room. You just need the software that connects the two.

How it works

Three steps. No setup.

01

Download MacDisplay.

A single 13 MB app. Drag it to /Applications or run it from a USB stick. No installer.

02

Open it on both Macs.

Same app, two roles. The source Mac sends its display. The receiver Mac becomes a monitor.

03

Plug in and work.

Thunderbolt cable, Ethernet, or shared Wi-Fi. MacDisplay finds the link. Your desktop extends.

Plug in. Open. Extended.

Why MacDisplay

Built like macOS apps used to be built.

Six things that, taken together, no other display-sharing app on the Mac actually delivers.

01

Zero hardware.

No dongle, no receiver box, no Lightning adapter. Two Macs. One cable. That's it.

02

Zero account, zero cloud.

No sign-up. No tracking. No telemetry. The app does not talk to any server we run.

03

13 megabytes. Runs also from USB.

Smaller than a single photo. Notarized by Apple. Executes from /Applications, Desktop, or a stick.

04

Thunderbolt, Ethernet, Wi-Fi.

Automatic failover between transports. If the cable drops, the LAN takes over without a hitch.

05

LAN-only by design.

Your pixels never leave your network. No cloud relay. GDPR-friendly by construction, not policy.

06

€29,99. Once. Forever.

Buy it once, own it forever. Updates included. No subscription, no in-app purchases, ever.

QuickMonitor Bonus feature

A USB stick is all you need.

For day-to-day use, MacDisplay just installs on your two Macs. QuickMonitor is the bonus feature for when the receiver Mac isn't yours.

Export a tiny receiver binary onto any USB stick. Plug the stick into any Mac — a friend's, a colleague's, a hotel front-desk's — double-click, and that Mac becomes your second monitor for the session.

When you unplug, nothing remains. No installer. No background service. No trace.

  • Export from MacDisplay in two clicks.
  • Runs on any Mac with macOS 11 or later.
  • Auto-removes from the host on quit.
Compare

Four ways to add a second screen.

Feature Luna Display AirPlay Duet Display MacDisplay

Comparison based on publicly verifiable information at the date of publication. Trademarks belong to their respective owners. MacDisplay is not affiliated with, endorsed by, or sponsored by Astro HQ (Luna Display), Apple Inc. (AirPlay), or Kairos (Duet Display).

Made for

Every Mac, in any situation.

Any Mac from 2013 onwards. New, recent, or vintage. Working machine or backup. Yours, a family member's, a colleague's. If it's a Mac, it can become your screen.

More screen, without buying a monitor.

You're at your desk with the MacBook. You want more space. The iMac next to you becomes your second display in seconds. Then you go back to the MacBook alone whenever you want.

Off-site meeting. One extra screen.

You're at the client's place with your MacBook. Open MacDisplay on the meeting-room Mac: your desktop extends. You present, work, take notes across two screens. When you leave, nothing remains.

Work anywhere, even away from home.

On a trip, on holiday, at your parents'. You bring the MacBook. The second screen you find on-site: a relative's Mac, a friend's. A USB stick is enough to turn it into a monitor. Up and running in a minute.

When you need a screen now.

At a coworking space, at university, on a group project. The Mac of the colleague next to you can become your second screen for an afternoon. Same app, same network, double the space. Disconnects when you're done.

Privacy & security

Built LAN-first. Always was.

MacDisplay is a private piece of software. It connects two of your Macs and gets out of the way.

  • Cable or LAN only.
    Pixels travel through the cable or your local network. They never reach a server we operate.
  • Nothing leaves your network.
    No relay. No proxy. No cloud. If your router is off, MacDisplay still works between Macs on the same cable.
  • No account, no tracking.
    We don't ask for an email. We don't run analytics inside the app. GDPR-friendly by design.
Compatibility

Works with what you already own.

If you bought a Mac in the last decade, MacDisplay will run on it.

Source MacmacOS 12.3 or later
Receiver MacmacOS 11 or later
ConnectionsThunderbolt 3/4/5 · Gigabit Ethernet · Wi-Fi 5 GHz
App size13 MB · universal binary · notarized by Apple
LanguagesEnglish · Italian (more coming)
Free version

Try it free, with no time limits.

MacDisplay is free to download and try. Use it right away on any Mac, with no account, no credit card. The free version has time-limited sessions, perfect for occasional use. The full license unlocks unlimited sessions.

Per session

10-minute sessions

Each extension session lasts up to 10 minutes. A warning notifies you 1 minute before automatic disconnect.

Between sessions

60-second cooldown

A short 60-second pause between sessions. Then you can reconnect.

Every 24 hours

60 free minutes per day

Use up to 60 minutes of free extension every 24 hours. More than enough for occasional use.

With the full license

Every limit, gone.

One €29,99 license removes the timers and unlocks the full multi-device setup.

  • Unlimited sessions

    No 10-minute timer. No 60-second pause. No 60-minute daily cap. Just use the screen.

  • Up to 3 sender Macs

    Install your license on up to three personal Macs you use to send the display — desktop, laptop, work machine.

  • Unlimited receiver Macs

    Connect to any Mac as a receiver — iMac in the studio, a borrowed Mac, QuickMonitor on a USB stick. No cap, no count.

+ VAT · one license, forever
Pricing

One price. Once. Forever.

€29,99 + VAT
Start free trial

Free to download and try. Secure payment through Paddle.

FAQ

Questions, answered.

If something isn't covered here, email support@macdisplay.it.