Second-screen app Duet Display received a significant update today, introducing a new resolution option to support Apple's 12.9-inch iPad Pro and bringing significant performance improvements for both iPads and Macs that run the accompanying software.

For those unfamiliar with Duet Display, it's an app that is designed to turn the iPad or iPhone into a secondary display for a Mac. Duet Display was the first app to use a Lightning cable to allow an iPad or iPhone to interface with a Mac, thereby drastically cutting down on the lag that's typically present when an iOS device is used as a secondary display for a Mac over Wi-Fi.


Since its late 2014 launch, Duet Display has been updated several times to improve performance on a wide range of iPads and iPhones, but according to Duet Display developer Rahul Dewan, today's update brings "massive performance improvements." Improving performance was necessary to allow a Mac or PC to drive the high-resolution display of the iPad Pro while maintaining a lag-free connection, but the improvements also apply to all older iPads.

With the latest version of Duet Display, CPU usage has been reduced by over 80 percent on iPad and Mac or PC, thanks to a new algorithm that's more efficient and an intelligent refresh feature that's similar to the iPad Pro's own faster refresh technology, but on the software end. Extremely high CPU usage was one of our major complaints with Duet Display when it was first released and it's been a customer concern for some time, so this update should go a long way towards fixing one of the major pain points in the app.

Duet Display has proven to be a popular app with iPad owners as it gives the iPad the versatility to be used as a second display for a Mac. iPad Pro owners may find Duet Display to be especially useful given the large screen real estate of the device.

Duet Display can be downloaded from the App Store for $9.99 (reg. $15.99). [Direct Link]

Top Rated Comments

djeeyore25 Avatar
131 months ago
I wish I could use my Apple Watch as a second display.
Score: 7 Votes (Like | Disagree)
keysofanxiety Avatar
131 months ago
I wish I could use my Apple Watch as a second display.
Lawrence of Arabia never looked better!
Score: 3 Votes (Like | Disagree)
MyopicPaideia Avatar
131 months ago
Now just give us that 2nd external screen!! Two old iPads that are begging to be used simultaneously as external monitors for my Retina Macbook!!!
Score: 1 Votes (Like | Disagree)

Popular Stories

iOS 26

15 New Things Your iPhone Can Do in iOS 26.2

Friday December 5, 2025 9:40 am PST by
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below. Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
Intel Inside iPhone Feature

Apple's Return to Intel Rumored to Extend to iPhone

Friday December 5, 2025 10:08 am PST by
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone. In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....
iPhone 14 Pro Dynamic Island

iPhone 18 Pro Leak Adds New Evidence for Under-Display Face ID

Monday December 8, 2025 4:54 am PST by
Apple is actively testing under-screen Face ID for next year's iPhone 18 Pro models using a special "spliced micro-transparent glass" window built into the display, claims a Chinese leaker. According to "Smart Pikachu," a Weibo account that has previously shared accurate supply-chain details on Chinese Android hardware, Apple is testing the special glass as a way to let the TrueDepth...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Monday December 1, 2025 2:40 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
Johny Srouji

Apple Chip Chief Johny Srouji Could Be Next to Go as Exodus Continues

Sunday December 7, 2025 10:41 am PST by
Apple's senior vice president of hardware technologies Johny Srouji could be the next leading executive to leave the company amid an alarming exodus of leading employees, Bloomberg's Mark Gurman reports. Srouji apparently recently told CEO Tim Cook that he is "seriously considering leaving" in the near future. He intends to join another company if he departs. Srouji leads Apple's chip design ...
iOS 26

Apple Seeds Second iOS 26.2 Release Candidate to Developers and Public Beta Testers

Monday December 8, 2025 10:18 am PST by
Apple today seeded the second release candidate version of iOS 26.2 to developers and public beta testers, with the software coming one week after Apple seeded the first RC. The release candidate represents the final version iOS 26.2 that will be provided to the public if no further bugs are found. Registered developers and public beta testers can download the betas from the Settings app on...
Johny Srouji

Apple's Chipmaking Chief Johny Srouji Responds to Report About Him Potentially Leaving

Monday December 8, 2025 9:23 am PST by
Apple's chipmaking chief Johny Srouji has reportedly indicated that he plans to continue working for the company for the foreseeable future. "I love my team, and I love my job at Apple, and I don't plan on leaving anytime soon," said Srouji, in a memo obtained by Bloomberg's Mark Gurman. Here is Srouji's full memo, as shared by Bloomberg:I know you've been reading all kind of rumors and...
top stories 2025 12 04a

Top Stories: iOS 26.2 Coming Soon, Apple Execs Depart, and More

Saturday December 6, 2025 6:00 am PST by
You'd expect things to be starting to wind down for the holidays by now, but that doesn't seem to be the case yet in the world of Apple news, with Apple just about ready to release iOS 26.2 and other operating system updates to the public. There was also a flurry of news this week about Apple executive departures, some expected and some not so expected, while we also learned that Apple and...
ive and altman

Jony Ive's OpenAI Device Barred From Using 'io' Name

Friday December 5, 2025 6:22 am PST by
A U.S. appeals court has upheld a temporary restraining order that prevents OpenAI and Jony Ive's new hardware venture from using the name "io" for products similar to those planned by AI audio startup iyO, Bloomberg Law reports. iyO sued OpenAI earlier this year after the latter announced its partnership with Ive's new firm, arguing that OpenAI's planned "io" branding was too close to its...