Air Display lets you use a spare Mac’s screen as an extra display for your main Mac.

It's easy to use! Just launch this app on your spare Mac, then connect to it from the free host app on your main Mac, to instantly expand its screen real estate. You can connect wirelessly or with a cable.

IMPORTANT: This is NOT the free Air Display host software that you need on your main computer. You can download that at This is the client app that turns one Mac into a second monitor for another Mac.


• Drag windows, apps, or control palettes from your main screen to give yourself more room to work
• Use up to 4 devices simultaneously to extend or mirror your computer
• Run either full-screen or in a window
• Either extend your screen to get more room to work or mirror to share your screen with an audience
• Connect via Wi-Fi or with a wired connection (Ethernet, Thunderbolt, or USB-C)


Just install the free Air Display host app (from on your main Mac, and download this Air Display client app on your second Mac.

• Purchase this app on the Mac you want to use as your second display
• On your main computer, go to and install the free host app
• You can install this app onto multiple Macs, as long as they use the same Apple ID

If you want to use your iPad or other device as your second screen, you do not need to purchase this app. Air Display for iOS is available in the iTunes App Store (and you’ll still need the same free host software on your main computer).


• Both computers must be on the same Wi-Fi network, or connected via Ethernet, Thunderbolt, or USB-C
• Mac client app: macOS 10.8 and above
• Mac host: macOS 10.10 and above (not compatible with macOS 10.13.4–10.13.6)
• The Air Display host software is not compatible with Windows

What’s New

Version 3.4.2

• Added more resolutions for different Mac displays.
• Fixed sleep prevention while connected; it wasn't working on Mojave and Catalina.
• Fixed some other bugs.
• The latest Host software fixes a bug that could make the mouse invisible while mirroring displays.
• To enjoy the new features and bug fixes, please “Check for Updates“ in the Air Display Host software on your Mac.

For occasional Air Display news, sign up for our newsletter at the bottom of the homepage.

Please leave a review in the App Store! We love your feedback.

Ratings and Reviews

jonro2242 ,

It Works Well, But...

Air Display works well with a wired connection and more haltingly over Wi-Fi. The problem I'm having is that I can't play any iTUnes playlists when AirDisplay is running, and there doesn't seem to be anything that can be done about it.

Developer Response ,

Hi. Thanks for reporting this issue; we haven't heard about it before. Please contact us at so we can get more details about what you're trying to do, and hopefully figure out a workaround or fix. —Pip

AbbottHouseInteriors ,

Not Happy Thus Far

From the beginning of using this app the screen resolution on my iMac Retina has been unusable. I am using a Macbook Pro as the host and my 27" iMac as the secondary screen. I will give the company points for their customer service. They worked with me and resolved the screen resolution issue with an update to the app but it took a couple weeks. My biggest complaint now, and its been this way since the beginning, is the mouse is extremely laggy on the secondary display. Another problem i'm going to work with the customer support about but it seems to be one thing after another with this app. I wish Apple would have just kept this feature so we don't have to go through 3rd parties to make this useful. Really want to like this app but it doesn't seem to be cutting it for what I need.

Tian V ,

It Just Works

I'm a long time user & a while ago with an OS update the app broke. The developers let us know promptly.

I just installed the new version & it works flawlessly for me. I actually had a problem with the cursor not showing on the second monitor (computer) & had a tech support email queued up — but before I sent it an update was issued that fixed the problem. Tech support doesn't get a lot better than that.

I'd suggest that you ignore negative reviews of this app & give it a try — it has been a great help to me in putting an extra Mac to use. It's quick & reliable (at this point).


Avatron LLC
2.5 MB

OS X 10.8 or later, 64-bit processor


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  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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