This is where a 2nd USB-C port on a MB would really come in handy. One to go to a dock, the other to a USB-C monitor.
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Using your MacBook with the new LG UltraFine 4K display (USB-C)
- Thread starter BeatCrazy
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This is where a 2nd USB-C port on a MB would really come in handy. One to go to a dock, the other to a USB-C monitor.
UPDATE: With the new LG, the 12" also continues to suffer the black out issue as noted with other external monitors. A reboot, like always, fixes it. Sure looks like it's a FW or OS thing in Sierra for the 12". Once rebooted, it works as a display very well.
And plug in the charging cable on either side!
My dream is to have a rMB with TB3 or a GPU that supports DisplayPort 1.3. Intel's fault, always.
Hi, i have MacBook Pro (Retina, 15-inch, Mid 2014) with: NVIDIA GeForce GT 750M 2048 MB.
I can link the lg ultrafine 4k with my macbook with
USC C / Thunderbolt 2 adapter
Thunderbolt cable
example setup: http://imgur.com/a/5Tntz
will it work?
Thanks
I can link the lg ultrafine 4k with my macbook with
USC C / Thunderbolt 2 adapter
Thunderbolt cable
example setup: http://imgur.com/a/5Tntz
will it work?
Thanks
Good question. Until yesterday, I had the LG UD2788 (has USB-C) in house, and could have tested a similar set-up. But can't anymore as I took the display back.
Apple doesn't say it will work. The real question is can TB2 support DisplayPort Alt-mode? I dunno. We know it would do MST to a 4K display. But I don't know how DP Alt-mode and MST are related.
I'm surprised these are still on a 5-6 week backorder... I want one, but having to wait till January is a bit ****** 
How often does this happen? This sounds very annoying. I ordered my 2016 MacBook yesterday because I thought with the 4k Ultrafine monitor there won't be any hassles running 4k@60hz but the issues I'm reading are worrying me.
It does run 60Hz. However, the blackout issue seems to be something with all MBr's. It happens when you dock (most of the time) without a restart of the Mac. A restart always corrects the issue for me.
@kwandrews: Thanks for the clarification. It still sounds annoying but not like a potential dealbreaker. It would be much worse if it happened randomly and not just when you are docking.
If someone has to try, post it
Tried with my Late 2015 27" iMac using the Apple dongle you mentioned to connect the 24" Ultrafine. It doesn't work. The display is fine and working with my Touchbar rMBP.
Link? I'm desperate to find a cable that will make this thing work with my iMac but can't find any such thing. I even emailed DisplayPort to ask because they mention a "standard USB Type-C to mini DisplayPort adapter cable" but I can't find any such thing.
Sorry, I was mistaken. Dell has a DP to USB-C adapter, it will not work with Ultrafine.
Ya, that's for DisplayPort over USB-C, which is different than converting DisplayPort to USB-C.
Impressive they made this work with 2015 rMB even though 48hz. Even so at 4K that feels like an accomplishment to me
(From what I'm reading don't own an lg monitor)
Wish I could see a video of base 2015 running on a monitor,
(From what I'm reading don't own an lg monitor)
Wish I could see a video of base 2015 running on a monitor,
Last edited:
johnnyturbouk
macrumors 68000
Agreed, 24" would have made far more sense, I guess they wish to keep the monitor sizes in alignment with their imac series. Dual 24" 4Ks would be perfect for me.
Ever since upgrading to 10.12.2, this problem appears to have been fixed. (That is, I can dock and undock from the Ultrafine 4K without rebooting and without experiencing the blackout problem). I'm wondering if this is also your experience?
I'm using the LG27UD88 monitor with a 2016 rMB m7 over USB-C and I am quite disappointed with how it looks at all resolutions. The fonts just don't look smooth even at 60 Hz unless it's 1920x1080 (screen shots at 72 dpi below). I don't know if it's my expectations that are wrong but I essentially want to have a bigger version of my rMB screen! The one positive is that I haven't noticed any lag at all, but then I haven't yet had a chance to put it through its paces much.
Also attached is a dual boot Lenovo M700 Tiny, via DisplayPort - I am sad to say that both Linux (even running Gnome) and Windows 10 look more polished than Mac OS does at 3840x2160 or 2560x1440.
As an aside having the real estate 4K offers is great but it's quite daunting to open up an Excel spreadsheet and find you can see rows 1:109 and columns A:BG all at once!
are you able to charge your new 15" with either the included cable or the white apple one once you turn the off the monitor? I plugged my laptop in thinking it would charge overnight... nope! dead battery
Its supposed to be run at 4k, but you can scale the resolution. Dont try and run it at 1080p.
Try switching the USB-C cable around and using it the other way (monitor side to MacBook > MacBook side to monitor). This sounds stupid, but has apparently worked for many others online. LG are shipping a sketchy USB-C cable with it.
It's only 60W output, and MBPs require 85W. Not sure what that means, though - it should charge, just more slowly. Like using an iPhone charger for your iPad...
I'm no electrical engineer though, so I may be way off!
Edit: FWIW I use a 27UD88-W with my rMB and absolutely love it. I use it at "looks like 2560x1440" in HiDPI mode (ie. scaled 4K) and it's absolutely fantastic. I use the DisplayPort connection for my gaming PC rig. Brilliant monitor, genuinely impressed.
i tried that and also tried using the apple one and no dice. I've also had issues with it connect to the monitor. It would charge when I turn it on but there is no signal to the monitor on both cables.