macOS 10.15 Said to Feature 'Luna Display-Like' Desktop Extension Functionality - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

macOS 10.15 Said to Feature 'Luna Display-Like' Desktop Extension Functionality

macOS 10.15 will have a new feature that allows users to send any window of any app to an external display, according to 9to5Mac's Guilherme Rambo. The external display can supposedly be a monitor connected to the Mac or even an iPad.

luna display macbook

Luna Display

The report claims this functionality will be accessible via a new menu that can be opened by hovering over the green "maximize" button in a Mac app window for a split second. The menu is expected to provide options for making windows full-screen, tiling windows, and moving windows to external displays.

The feature, codenamed "Sidecar," is said to be similar to the Luna Display hardware solution that turns an ‌iPad‌ into a second display for the Mac.


Users with an ‌iPad‌ that supports Apple Pencil will be able to draw with the Pencil when the ‌iPad‌ is being used as an external display for the Mac, effectively "turning the ‌iPad‌ into a Wacom-like tablet," according to the report.

The report claims Apple is also working on options that will allow windows to be easily snapped to one side of the screen.

Related Forum: macOS Catalina

Popular Stories

Apple Card iPhone 16 Pro Feature

Apple Card Promo to Offer Free AirPods Pro 3

Friday May 15, 2026 8:59 am PDT by
Starting as early as next week, customers who sign up for an Apple Card at Apple's retail stores in the U.S. will receive $249 cash back when they purchase AirPods Pro 3, according to Bloomberg's Mark Gurman. The promotion has yet to be officially announced by Apple, so exact terms and conditions are not available at this time. AirPods Pro 3 are priced at $249 in the U.S., so customers who...
Apple WWDC25 iOS 26 CarPlay Light mode 250609

Six Popular iPhone Apps Now Available on CarPlay

Thursday May 14, 2026 9:10 am PDT by
Apple's CarPlay system for accessing iPhone apps on a vehicle's dashboard screen has received six popular apps in recent weeks: ChatGPT, Perplexity, Grok, Google Meet, WhatsApp, and the indie artist streaming platform Audiomack. Make sure you have the latest version of each app and they will automatically appear on CarPlay. ChatGPT Starting with iOS 26.4, CarPlay supports voice-based...
ipad mini 7 blue

OLED iPad Mini: Release Date, Pricing, and What to Expect

Thursday May 14, 2026 5:08 am PDT by
According to the latest rumors, Apple is close to launching its next-generation iPad mini. So what should we expect from the successor to the iPad mini 7 that Apple released over a year ago? Read on to find out. Processor and Performance Apple is working on a next-generation version of the iPad mini (codename J510/J511) that features the A19 Pro chip, according to information found in code...

Top Rated Comments

93 months ago
as long as this doesn't require brand new iPads it could help breathe some life into older ones. great codename btw, "sidecar", nailed it.
Score: 18 Votes (Like | Disagree)
cmaier Avatar
93 months ago
There are also indications (stroughton smith) that you’ll be able to combine with handoff-like functionality. In other words, when working with an app on the mac, send it to your iPad, and it can actually launch the ipad version of the app and populate it with the app state so you can keep working on your ipad without being anywhere near the mac. With marzipan, many ipad apps will be identical code to their mac versions, which will make this much easier for developers to support.
Score: 9 Votes (Like | Disagree)
EvilEvil Avatar
93 months ago
Finally a useful feature from Apple!
Score: 8 Votes (Like | Disagree)
PickUrPoison Avatar
93 months ago
As much as I love BTT, if those features are built in to macOS, it’ll go the path of F.Lux.
Maybe BetterSnapTool will, but BTT also has all the TouchBar and mouse/trackpad/keyboard customizations so I think it’ll still be around.
Score: 6 Votes (Like | Disagree)
uajafd Avatar
93 months ago
I just can see Luna Display yanked from the App Store for "duplicating the core functionality" in 3... 2... 1...
Score: 6 Votes (Like | Disagree)
PBG4 Dude Avatar
93 months ago
Awesome! Can’t wait for these features to be added.
Score: 6 Votes (Like | Disagree)