Mac Desktop Extension Software Duet Display Rendered Inoperable in macOS 10.13.4 [Updated]

Users of popular Mac desktop extension app Duet Display are being advised not to update to macOS 10.13.4, due to "critical bugs" that prevent the software from communicating with connected iOS devices used as extra displays.

When installed on a Mac and an iPad (or iPhone) and the two devices are connected using a Lightning cable or 30-pin connector, Duet allows users to extend their macOS desktop space on the Retina display of the iOS device. However, unspecified changes in the latest update to macOS High Sierra, released by Apple yesterday, causes the Duet client app to hang, and users are being advised to hold back from upgrading, at least for now.


Duet's developers are recommending that users contact Apple through the company's online bug reporting form to get the issue prioritized. In the meantime, the developers are "actively looking" into workarounds to reinstate Duet's functionality in macOS 10.13.4.

Duet Display is priced at $19.99 in the App Store, and unlocking the Pro features to turn the iPad Pro into a drawing tablet costs an additional $19.99 per year through an in-app subscription. Duet Display is available from the App Store. [Direct Link]

Update: Users of other desktop extension apps like Air Display and iDisplay are also reporting incompatibility with macOS 10.13.4. DisplayLink-enabled USB graphics devices are also reportedly affected. There's some speculation that Apple's added eGPU support in 10.13.4 is the underlying cause of the issues. We'll keep readers updated if we hear more.

Related Roundup: macOS 10.14


Top Rated Comments

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3 weeks ago
Is it really a bug or did Apple intentionally change things that happened to break compatibility? Might not be a bug, and just the outcome of system changes to macOS
Rating: 14 Votes
Avatar
3 weeks ago

It never used to be this way with Apple, but unfortunately, this is what they’ve become.


Yes it did. People have ALWAYS said this.

I remember Snow Leopard wiping out people’s entire home folders. And 10.2.8 killing Ethernet. Etc.
Rating: 12 Votes
Avatar
3 weeks ago
I’ve been saying this for a year now and it still holds true: if you rely on your Mac for work, you can no longer trust Apple.

I have lost all faith in Apple’s ability to release software updates that do not break critical functions. There has not been a single major dot release in the last two years that has not broken something critical to my workflow. Not a single one.

After High Sierra is stable, I will not update my Macs for nearly a year until the next OS has stabilized. It never used to be this way with Apple, but unfortunately, this is what they’ve become.
Rating: 11 Votes
Avatar
3 weeks ago

Not a bug at all; 10.13.4 only supports displays which are directly connected by a GPU or by AirPlay.


Removing the clutter

Like battery estimates.

I still modify battery.menu to output battery
Time predictions on 10.12.6 even tho they scrapped it after .1 or .2 or something

Apple can’t come up w new features so new features has to be taking away features.
Rating: 10 Votes
Avatar
3 weeks ago

I’ve been saying this for a year now and it still holds true: if you rely on your Mac for work, you can no longer trust Apple.

I have lost all faith in Apple’s ability to release software updates that do not break critical functions. There has not been a single major dot release in the last two years that has not broken something critical to my workflow. Not a single one.

After High Sierra is stable, I will not update my Macs for nearly a year until the next OS has stabilized. It never used to be this way with Apple, but unfortunately, this is what they’ve become.


Hmmm....I use one every day for work (network engineer) and I would not have it any other way.

My only real complaint is when I have to use my USB to serial adapter to console into piece of equipment on site. USB-C to USB-A dongle, Keyspan USB-A to serial dongle, null modem cable to device or serial to ethernet to device. It is quite the frankestein setup in those cases....but it works every time.

I live in Omnigraffle Pro, Safari, Terminal, Secure CRT, mail, Excel, Word, etc.
Rating: 7 Votes
Avatar
3 weeks ago

('//www.macrumors.com/2018/03/30/mac-desktop-extender-duet-bug-macos-10-13-4/')


Users of popular Mac desktop extension app Duet Display ('https://www.duetdisplay.com') are being advised not to update to macOS 10.13.4, due to "critical bugs" that prevent the software from communicating with connected iOS devices used as extra displays.

When installed on a Mac and an iPad (or iPhone) and the two devices are connected using a Lightning cable or 30-pin connector, Duet allows users to extend their macOS desktop space on the Retina display of the iOS device. However, unspecified changes in the latest update to macOS High Sierra, released by Apple yesterday ('//www.macrumors.com/2018/03/29/apple-releases-macos-high-sierra-10-13-4/'), causes the Duet client app to hang, and users are being advised to hold back from upgrading, at least for now.



The critical issue was highlighted by Duet's ex-Apple developers in a blog post ('https://help.duetdisplay.com/faq/305404-macos-10-13-4-support') on the Duet support site, quoted from below.
Duet's developers are recommending that users contact Apple through the company's online bug reporting form to get the issue prioritized. In the meantime, the developers are "actively looking" into workarounds to reinstate Duet's functionality in macOS 10.13.4.

Duet Display is priced at $19.99 in the App Store, and unlocking the Pro features to turn the iPad Pro into a drawing tablet costs an additional $19.99 per year through an in-app subscription. Duet Display ('http://appshopper.com/productivity/duet-display') is available from the App Store. [Direct Link ('https://itunes.apple.com/us/app/duet-display/id935754064?mt=8')]

Article Link: Mac Desktop Extension Software Duet Display Rendered Inoperable in macOS 10.13.4 ('//www.macrumors.com/2018/03/30/mac-desktop-extender-duet-bug-macos-10-13-4/')

This was an issue all throughout the beta period. I let the developer know early on.
[doublepost=1522414141][/doublepost]

I’ve been saying this for a year now and it still holds true: if you rely on your Mac for work, you can no longer trust Apple.

I have lost all faith in Apple’s ability to release software updates that do not break critical functions. There has not been a single major dot release in the last two years that has not broken something critical to my workflow. Not a single one.

After High Sierra is stable, I will not update my Macs for nearly a year until the next OS has stabilized. It never used to be this way with Apple, but unfortunately, this is what they’ve become.


To be fair, Duet Display is essentially a hack. It isn’t as if Apple intended the iPad to be used as an extended display for a Mac. If they did, they’d have built it in themselves.
Rating: 6 Votes
Avatar
3 weeks ago

I've known that Duet doesn't work with MacOS 10.13.4 because I'm in the beta software programme from Apple. Duet have known about this problem for a while too, and they've told me they're actively working on a fix, which should be released shortly. They're pretty good at responding to emails and the message I got was that they are releasing a fix, and although Apple broke it with the latest update, I didn't get the impression that they were waiting for Apple to fix it.


Hey,

Our update is more of a very extensive workaround. We would still prefer a fix from Apple.
Rating: 6 Votes
Avatar
3 weeks ago
Man, I wonder if it just broke with the final version of the software or if Duet wasn't beta testing. That sucks just updated and I was using Duet with the Ekahau site survey and designing floor plans.
Rating: 6 Votes
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3 weeks ago
What bothers me is why would they make a change like this that breaks software in a point release.

I can actually understand software breaking after a major release, like Sierra -> High Sierra. But point releases should be about bug fixes and small changes, not major API changes that can completely break software.

With major releases, software devs have a lot more time to get their code working with the new OS during the beta period. With point releases, they have a lot less time.

What the hell, Apple?
Rating: 6 Votes
Avatar
3 weeks ago
Quality control team still moving into the spaceship also some of them crashed into the glass doors anyways it’s a mess.
Rating: 6 Votes
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