Questions & Answers for LG UltraFine 4K Display
66 Questions from the Community
Is the LG UltraFine 4K display compatible with the new mac mini?
- Asked by James L from Wakefield
- Nov 13, 2018
- Flag as inappropriate (Is the LG UltraFine 4K display compatible with the new mac mini?)
Can this be used as an extra monitor for an iMac Pro?
The 5K version of this monitor clearly specifies that the interface is Thunderbolt 3. This one only says USB-C. But non-thunderbolt monitors don't seem to work on the iMac Pro.
- Asked by Alexandre B from Bruichladdich
- Jun 22, 2018
- Flag as inappropriate (Can this be used as an extra monitor for an iMac Pro?)
Can you daisy chain this from the LG UltraFine 5K Display?
I already own this display (the LG UltraFine 4K) and I'm thinking of additionally purchasing the 5K display for use with my 2018 13" MacBook Pro with Touch Bar. Can the 4K display be connected to one of the output USB-C ports on the 5K display, thereby daisy-chaining it? I would prefer not to connect the two displays directly to my laptop, if possible.
- Asked by Jeremy F from San Francisco
- Sep 10, 2018
- Flag as inappropriate (Can you daisy chain this from the LG UltraFine 5K Display?)
The LG UltraFine 5K Display is a Thunderbolt 3 display which uses both DisplayPort connections of the computer's Thunderbolt controller. The Thunderbolt controller sends both DisplayPort signals to the Thunderbolt controller of the LG UltraFine 5K over the Thunderbolt cable. The Thunderbolt controller in the LG UltraFine 5K converts both Thunderbolt DisplayPort streams back into DisplayPort to be used by each half of the display (the left and right sides) to support 5K resolution.
That is also the reason why the LG 5K display does not have a second Thunderbolt 3 port - because it is required for one of the DisplayPort signals for one half of the display. The other DisplayPort signal comes out of a DisplayPort connection of the Thunderbolt controller of the display (think of a Thunderbolt 3 dock where you can connect one display to the second Thunderbolt 3 port of the dock, and another display to a DisplayPort output of the dock).
The Thunderbolt controller of the computer does not have a third DisplayPort connection, and since the LG 5K uses two DisplayPort connections (over Thunderbolt), an LG 4K display cannot be daisy chained to the LG 5K display.
Also, since a Thunderbolt controller only has two DisplayPort connections, if you connect a LG 5K to one side of the MacBook Pro, then a second display must be connected to the other side of the MacBook Pro (there's one Thunderbolt controller per side of the MacBook Pro). One 5K or two 4K per side of the MacBook Pro can be connected.
The USB-C ports of the LG UltraFine 5K only support USB. They do not support DisplayPort because there is no other DisplayPort signal on the Thunderbolt cable that can be used and the display has no other DisplayPort inputs.
It might be possible to use a USB to DisplayPort converter (research devices that use DisplayLink, find examples at the DisplayLink or plugable websites) but they don't perform like real displays and may have issues in macOS.
- Answered by Joseph V from Fort Langley
- Sep 10, 2018
- Flag as inappropriate Answer (Can you daisy chain this from the LG UltraFine 5K Display?)
Is it possible to connect 3 of these without connecting all three directly into a 2017 macbook pro?
I need the extra usb c ports for everything else.
It would be ideal to connect all three into a hub and connect the hub to one of the four usb c ports.
- Asked by Christopher B from Sherman
- Oct 25, 2018
- Flag as inappropriate (Is it possible to connect 3 of these without connecting all three directly into a 2017 macbook pro?)
Can this be rotated into portrait?
- Asked by Jack G
- Oct 28, 2016
- Flag as inappropriate (Can this be rotated into portrait?)
Yes. I use two on my 2017 MacBook Pro 15inch. One in portrait and the other in landscape. You just need a different mount; the mount provided only does landscape so you will need to VESA mount the display.
- Answered by Michael C from Dunbar
- Aug 31, 2018
- Flag as inappropriate Answer (Can this be rotated into portrait?)
Can I turn off the charging of the macbook from the monitor
Can I turn off the charging of the macbook from the monitor (when I already have a full charge of the battery), but at the same time that the monitor is connected and I could work with it.
- Asked by Sergey K
- Jul 21, 2018
- Flag as inappropriate (Can I turn off the charging of the macbook from the monitor)
Can two LG UltraFine 4k displays be connected to a MacBook Pro via the new Blackmagic eGPU?
I purchased the new Blackmagic eGPU which has two Thunderbolt 3 ports and one HDMI 2.0 port. One of the Thunderbolt 3 ports runs to my MacBook Pro, and the other Thunderbolt 3 port should be able to run to the LG display no problem.
Where the question lies is is it possible to connect a USB C display such as the LG UltraFine 4K to an HDMI 2.0 output using adapters or a USB-C to HDMI cable?
- Asked by Spencer G from Langley
- Jul 25, 2018
- Flag as inappropriate (Can two LG UltraFine 4k displays be connected to a MacBook Pro via the new Blackmagic eGPU?)
Refresh rate with a 2016 12 inch MacBook
I know that the refresh rate with a 2015 (!) 12 inch MacBook is 48Hz, but what is the refresh rate with the 2016 version of the 12 inch MacBook?
- Asked by Stefan S
- Dec 12, 2016
- Flag as inappropriate (Refresh rate with a 2016 12 inch MacBook)
You can use the LG UltraFine 4K Display with these Mac models:
4096 x 2304 @ 60Hz
MacBook (Retina, 12-inch, Early 2016)
MacBook Pro (15-inch, 2016)
MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports)
MacBook Pro (13-inch, 2016, Two Thunderbolt 3 Ports)
4096 x 2304 @ 48Hz
MacBook (Retina, 12-inch, Early 2015)
A Mac with built-in USB-C or Thunderbolt 3 (USB-C) ports is required; the display isn't compatible with Mac models that use Thunderbolt 2.
See Apple Support for Use the LG UltraFine 4K Display with your MacBook or MacBook Pro for more information.
- Answered by Jay H from Middleton
- Apr 6, 2017
- Flag as inappropriate Answer (Refresh rate with a 2016 12 inch MacBook)
Lg ultrafine 4K and a Mac Pro 2013 will work?
I buy it but the monitor is don't torn on, I have the thunderbolt 2 adaptor to USB c
- Asked by Iulius S from Prato
- Nov 30, 2016
- Flag as inappropriate (Lg ultrafine 4K and a Mac Pro 2013 will work?)
The UltraFine 4K Display is not a Thunderbolt display.
According to the document HT207447 "Use the LG UltraFine 4K Display with your MacBook or MacBook Pro" on Apple's support website, it will not work with Macs that use Thunderbolt 2.
Maybe it will accept a DisplayPort signal? Try using a USB-C to mini DisplayPort cable to find out.
The Apple Thunderbolt 3 to Thunderbolt 2 adapter is for Thunderbolt devices only. It does not pass DisplayPort signals.
The LG UltraFine 5K Display is a Thunderbolt display but will only work at 4K @ 60 Hz when using a Thunderbolt 2 port of the Mac Pro 2013. Read the document HT207448 "Use the LG UltraFine 5K Display with your Mac" for more information about that.
- Answered by Joseph V from Fort Langley
- Feb 12, 2017
- Flag as inappropriate Answer (Lg ultrafine 4K and a Mac Pro 2013 will work?)
Would this work with the older 15" MacBook Pro Retinas with their thunderbolt 2 ports and my PC that has a GTX 980Ti STRIX GPU?
No answers yet
Can the monitor be connected to a Gateway windows based desktop computer?
- Asked by Patty H from Round Rock
- May 19, 2018
- Flag as inappropriate (Can the monitor be connected to a Gateway windows based desktop computer?)
Can you use Apple TV on LG UltraFine 4K Display ?
- Asked by Jayvon V from Las Vegas
- Mar 9, 2018
- Flag as inappropriate (Can you use Apple TV on LG UltraFine 4K Display ?)
Short answer: No.
The Apple 4K TV has only an HDMI 2.0 output.
The LG UltraFine 4K display only has a USB-C input. It uses USB-C with DisplayPort alt mode. The USB-C cable has wires for the DisplayPort signal, and wires for a USB 2.0 connection which the LG display uses for brightness control, audio, and its USB ports.
Currently available HDMI 1.4 to DisplayPort adapters only support 4K 30Hz. Next year may see HDMI 2.0 converters that support 4K 60Hz but may cost up to $200.
Other computer monitors have HDMI 2.0 inputs and DisplayPort 1.2 inputs.
- Answered by Joseph V from Fort Langley
- Dec 16, 2017
- Flag as inappropriate Answer (Can I connect the 4k Apple TV to this display?. If so which adapter do I need?)
does this support standard VESA mounts?
I need to mount my monitors on swing arms - does this monitor support standard VESA mounts?
- Asked by David O from San Jose
- Oct 27, 2016
- Flag as inappropriate (does this support standard VESA mounts?)
Yes it does. Just mounted my two monitors on existing Neo-Flex mount.
- Answered by Asheesh S from Smryna
- Dec 9, 2016
- Flag as inappropriate Answer (does this support standard VESA mounts?)
Will this monitor work via a USB-C-to-Displayport Cable?
I'm wondering if I can drive this monitor from a USB-C-to-DisplayPort Cable.
I am looking at the upcoming Thunderbolt 3 docking stations, and all of the products announced only have 2 Thunderbolt-3 ports on them. Most have either HDMI or Displayport ports as well, though. I'm obsessive about cables/mess, and only want to have one connection running into my 2016 MacBook Pro with Touchbar.
My thinking is that I can use a USB-C-to-DisplayPort cable into the monitor from the dock, as the specs show that the Displayport on the dock can do 4K video.
1st, Will this actually work? I'm assuming it will.
2nd, Will all of the Monitor controls still work? I love how this monitor has all the brightness/color setting controlled through system preferences, and I would want this functionality to work as well.
Has anyone tested either of these things?
For reference, I am looking at the Belkin Thunderbolt 3 Express Dock HD, and the Henge Docks Tethered Dock for MacBook Pro 2016 (Thunderbolt 3).
- Asked by James F from Rockford
- Mar 3, 2017
- Flag as inappropriate (Will this monitor work via a USB-C-to-Displayport Cable?)
I just went through the same thing - and ended up returning the Belkin TB3 Express Dock. I have put my gigabit ethernet adapter and backup hard drive into the USBC ports on the monitor, and then one USB-C from the monitor into my MacBook Pro with Touchbar. I don't think it is quite as fast a network connection as I get when I plug the ethernet adapter directly into the McBP - but nice to have just one cable to disconnect and go.
I originally bought the Belkin TB3 dock to enable use of a lower cost 4k monitor - but then lots of reviews on problems with reawake after sleep, disconnect/reconnect cables to refresh display, etc. Decided to put the $350 from the belkin towards the nicer LG display and let it to the USB-C hubbing for me. Seems to be working out ok.
- Answered by Brad C from Princeton
- Sep 29, 2017
- Flag as inappropriate Answer (Will this monitor work via a USB-C-to-Displayport Cable?)
Can I connect a Thunderbolt 1 hard drive to the display (and therefore to my 2017 Macbook) via the apple Thunderbolt 2 to 3 dongle?
- Asked by Cortney F P from Summerfield
- Jun 26, 2017
- Flag as inappropriate (Can I connect a Thunderbolt 1 hard drive to the display (and therefore to my 2017 Macbook) via the apple Thunderbolt 2 to 3 dongle?)
No. The additional ports are USB-C, not Thunderbolt.
- Answered by Saul B from Pittsburgh
- Jun 28, 2017
- Flag as inappropriate Answer (Can I connect a Thunderbolt 1 hard drive to the display (and therefore to my 2017 Macbook) via the apple Thunderbolt 2 to 3 dongle?)
Yes, comes with an optional VESA plate, looks like 100x100 but doesn't say so.
- Answered by Vahan G from Emeryville
- Nov 21, 2016
- Flag as inappropriate Answer (Wall mountable)