OS X 10.10.3 Now Supports Dell's Dual-Cable 5K Monitor on Retina iMac and Mac Pro

With the release of OS X 10.10.3 last Wednesday, Apple has expanded support for high-resolution 4K and even 5K external displays (via 9to5Mac). Most notably, OS X 10.10.3 enables the Retina 5K iMac and 2013 Mac Pro to drive Dell's UP2715K 27-inch 5K display released late last year. The display requires more bandwidth than is currently supported over a current single DisplayPort/Thunderbolt cable, so it uses a dual-cable solution taking up two ports on the user's machine.

dell_up2715k_5k
This bandwidth issue for the current DisplayPort standard has been seen as a major roadblock keeping Apple from releasing a standalone 5K Thunderbolt Display. With the Retina iMac, Apple has been able to build custom internal components to drive the massive display, but for external displays, a dual-cable solution such as that used by Dell has been considered by many to be "un-Apple like."

As a result, Apple has been widely expected to wait until the release of Intel's Skylake platform with DisplayPort 1.3 support later this year before releasing an external 5K Thunderbolt Display that will function over a single cable. Whether the inclusion of support for Dell's dual-cable solution in OS X 10.10.3 is a sign Apple may be willing to adopt that arrangement for its own display and perhaps release it earlier is, however, unclear.

Beyond 5K displays, OS X 10.10.3 has also expanded support for 4K displays to include "most single-stream 4K (3840x2160) displays" at 60 Hz, expanding beyond the previous support of only Multi-Stream Transport displays introduced in late updates to Mavericks. The new 4K display support will function with most of the Mac line, from the 27-inch iMac to the brand-new Retina MacBook. However, only the Mac Pro and iMac will support full 4096x2160 resolution at 60Hz.

With OS X Yosemite v10.10.3, most single-stream 4K (3840x2160) displays are supported at 60Hz operation on the following Mac computers:

- MacBook Pro (Retina, 13-inch, Early 2015)
- MacBook Pro (Retina, 15-inch, Mid 2014)
- Mac Pro (Late 2013)
- iMac (27-inch, Late 2013 and later)
- Mac mini (Late 2014)
- MacBook Air (Early 2015)
- MacBook (Retina, 12-inch, Early 2015)

As for the new 12-inch MacBook, the laptop will be able to support displays and rates of 3840x2160 at a 30 Hz refresh rate and 4096x2160 at a 24 Hz refresh rate. MacBook users wanting to use such a display will, of course, need to use Apple's USB-C Digital AV Multiport Adapter to do so.

Related Forums: MacBook, iMac, Mac Accessories, Mac Pro

Popular Stories

15 New Things Your iPhone Can Do in iOS 18

18 New Things Your iPhone Can Do in iOS 18.1

Monday October 21, 2024 1:44 am PDT by
Apple is expected to release iOS 18.1 on Monday, October 28, bringing the first set of Apple Intelligence features to iPhone 15 Pro and iPhone 16 models. This update marks the first significant step forward in Apple's AI integration, offering a new Siri contextually-aware experience and a range of additional capabilities powered by on-device machine learning and large language models. There are a ...
Tim Cook Vision Pro

Tim Cook Admits Truth About Vision Pro Following Lackluster Sales

Monday October 21, 2024 8:21 am PDT by
The Wall Street Journal's Ben Cohen this summer interviewed Apple CEO Tim Cook about the Vision Pro, innovation, Apple Intelligence, and more. Image Credit: Vanity Fair Cook admitted that the Vision Pro headset is not a mass-market product due to its high price. "At $3,500, it's not a mass-market product," said Cook. "Right now, it's an early-adopter product. People who want to have...
airpods pro 2 pink

Apple Releases New AirPods Pro, AirPods, and AirPods Max Firmware

Tuesday October 22, 2024 11:39 am PDT by
Apple today released a new firmware update for the original AirPods Pro, the AirPods 2, the AirPods 3, and the Lightning version of the AirPods Max headphones. The new firmware is version 6F21, up from the prior 6A326 firmware that these devices were previously running. There is no word on what's included in the firmware, but given that these are all older models, it is likely that the new...
apple vision pro orange

Report: Apple May Stop Producing Vision Pro by the End of 2024

Wednesday October 23, 2024 6:11 am PDT by
Apple has abruptly reduced production of the Vision Pro headset and could stop making the current version of the device completely by the end of 2024, The Information reports. Citing multiple people "directly involved" in making components for the headset, the report says that the scaling back of production began in the early summer. This indicates that Apple now has a sufficient number of...
M4 Mac mini Silver Perspective

5 Reasons to Get Excited About the New Mac Mini

Wednesday October 23, 2024 6:55 am PDT by
Apple's Mac mini has long been a powerhouse in a compact form, offering impressive performance in a small package. With rumors swirling about a completely overhauled new model that is likely just days away from being announced, anticipation is building for what Apple has in store. From enhanced connectivity to major hardware upgrades, the upcoming Mac mini promises to bring significant...
M4 Mac mini Ortho Black Cooler

Gurman: 'M4 Mac Launch' is 'Next Week'

Tuesday October 22, 2024 10:29 am PDT by
Just a few hours after claiming that the first Macs with M4 chips are launching "very soon," Bloomberg's Mark Gurman has followed up with a slightly more specific timeframe. In his latest social media post today, he said an "M4 Mac launch" is on Apple's schedule for next week, but he did not mention a specific day. A concept of a smaller Mac mini with front-facing USB-C ports "Busy week for...
m3 mbp space black

Gurman: New MacBook Pro, iMac, and Mac Mini Models With M4 Chips Launching 'Very Soon'

Tuesday October 22, 2024 7:11 am PDT by
Apple is planning to launch its first Macs with the M4 series of chips "very soon," according to Bloomberg's Mark Gurman. In a social media post today, Gurman said these Macs will include new MacBook Pro, iMac, and Mac mini models specifically. He continues to expect the next Mac mini to feature a "revamped" design, in line with his previous reporting that said the new model will be nearly...
mac magic keyboard

Apple Working on New Magic Mouse 2, Magic Trackpad 2 and Magic Keyboard

Monday October 21, 2024 10:59 am PDT by
Apple may soon release new versions of the Magic Mouse, Magic Keyboard, and Magic Trackpad, according to code found in the iOS 18.1 release candidate by MacRumors contributor Aaron Perris. There are references to a new Magic Mouse 2, Magic Trackpad 2, and several Magic Keyboards, which would include versions with Touch ID and number pads, as well as models without. While there is no...
airpods pro 2 hearing aids

Apple Confirms AirPods Pro 2 Hearing Features Launching in iOS 18.1 Next Week

Monday October 21, 2024 5:32 am PDT by
Apple will release iOS 18.1 next week, introducing a suite of advanced hearing health capabilities to the AirPods Pro 2 and the first Apple Intelligence features. The timing of the update was confirmed by reviewers who were given early access to the AirPods Pro 2's new hearing health features, which are now known to be included in the update. The update will include three core features:...
Whatsapp Feature

WhatsApp for iOS Gets New Home Screen Widget for Chats, Camera Updates

Monday October 21, 2024 2:37 pm PDT by
Popular messaging app WhatsApp was today updated to add a new Home Screen widget that's specific to chats. The widget is available on the iPhone after updating to version 24.21.81, which came out this afternoon. After updating the widget can be added to the Home Screen using the Edit interface. Users can choose from Recents, Favorites, Pinned, or Frequently Contacted to get quick access to...

Top Rated Comments

MTW Avatar
124 months ago


- WORST OF ALL: it almost never wakes from sleep (and powering on/off) won't help. You basically have to power down your ENTIRE MAC every time you walk away, because otherwise you'll end up blind and having to force-shutdown. Which I've done many times, and yes, data loss can result. Only a full boot will make a picture appear reliably..
Hi. Long time reader, zero time commenter. Registered as I know the solution to the problem you're having!

Check your revision sticker on the back of your monitor. Dell did a silent update to that monitor to fix the issues you describe. They come from a buggy MST implementation - most 4k monitors shipped early on have that problem. If your revision is A00 call Dell support. They will need to replace the whole monitor for you. You'll get the A01 revision, which has that bug fixed.

As a bonus, you'll get a new stand (which doesn't sit on a weird angle)

One more thing: the P2415Q exists now. Much cheaper ($400) and doesn't use MST at all - so absolutely zero MST weirdness. Just like a normal monitor.
Score: 13 Votes (Like | Disagree)
SpiderDude Avatar
124 months ago
"- MacBook (Retina, 12-inch, Early 2015)"

Dual 5k monitors on an intel M core.
That oughta be fun...
Score: 11 Votes (Like | Disagree)
bugout Avatar
124 months ago
and dell is still charging 2499 for just the monitor.. Apple should add support to use a second 5k imac as a monitor.. it's the same damn price..
Score: 7 Votes (Like | Disagree)
MTW Avatar
124 months ago
Thanks! I've heard that, but I've also heard of the new revision NOT fixing the problem.

And I WILL get a used/refurb if I ask for that swap: more hairs and dust and scratches than the brand-new one came with. I've heard horror stories.

I'm still thinking of trying it, but with the solution being less than certain, I don't want to for now. (Plus I've heard Dell makes you pay for costly shipping?)
I had the UP2414Q before I upgraded. The revision fixed the problem for me. MST in and of itself is a dirty hack, a MST monitor will never operate quite like a SST monitor. Still, after the swap the weirdness should just be 'the monitor takes an extra second or two to wake after sleep'

AFAIK they come in retail packaging.

Dell does not make you pay for shipping.

You could always sell the UP2414Q and get the P2415Q. That one fixes most of your complaints, doubly so the MST-related ones. It doesn't pretend to have a metal finish anymore, it doesn't have touch buttons. Just all together better. I say 'sell' as the UP2414Q is, for reasons passing my understanding, selling for more than the P2414Q's MSRP. Maybe people really want that 'metal' housing?

Oh, and the UP2414Q will never work right on non-2013 Mac Pros (no MST support), but the P2415Q will work on any Mac Pro with a DisplayPort 1.2 GPU (a MacVidCards 7950/7970 being among the cheapest ways to get one)

Plug and play.


Yes, they do have one part-timer--and her job (which she did badly) was to copy this:

Image (http://origin.arstechnica.com/journals/apple.media/metalimac9.jpg)
Oh please. Dell's ports-on-back design predates that iMac even existing. Putting ports on the back of the display isn't even close to something Apple 'owns'. Apple may 'own' the ports facing straight out, I get that....but Dell displays have them facing down (an annoyance to anyone who needs to unplug something from their monitor)

Either way, that seems like a really silly thing to be screaming 'knockoff!' about.
Score: 6 Votes (Like | Disagree)
palebluedot Avatar
124 months ago
So... if you think a Dell is the display of your dreams, go in with low expectations. Expect a cheaply-made, unreliable stopgap until you can afford (and find!) something better.

I think you are wrong on this. Dell customer support for their high-end/pro monitors is equivalent to AppleCare/Apple customer support in my experience. I've personally had Dell go through 5 seperate monitors with me to make sure I found one with the gamut, lack of bleed, and angles I liked.

I've had just as many mfg defects in Apple products as Dell monitors and I've found both companies (with the exception of having to email Tim Cook to get something fixed once) easily stand behind their products. YMMV, but I think you may be an outlier there. Should have called Dell and gotten a new unit.
Score: 5 Votes (Like | Disagree)
kyjaotkb Avatar
124 months ago
"- MacBook (Retina, 12-inch, Early 2015)"

Dual 5k monitors on an intel M core.
That oughta be fun...

That's not what the article says: it says the Retina Macbook only supports 1 4K display up to 3840*2160 @30Hz.
Score: 5 Votes (Like | Disagree)