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27" Class UltraFine™ 5K IPS LED Monitor (27" Diagonal)

  • 27MD5KA-B

  • Black

Key Features

  • 5K (5120 x 2880) IPS Display
  • 218 Pixel Per Inch
  • P3 99% Color Spectrum
  • Thunderbolt™3
  • Built-In Camera & Speaker
Ultra Clear 219 PPI 4K Display

Ultra Clear 218 PPI 5K Display

At 218 pixels per inch to deliver 5K resolution (5120 x 2880 at 27”) the LG UltraFine™ 5K display lets you experience the definition and detail of a Mac on a large 5K screen.

Rich Color, Better Detail

Rich Color, Better Detail

A color spectrum of P3 99% enables you to edit your high-resolution photos precisely. You will experience exceptional detail and rich color on this 5K display.

The World’s First 5K Display with Thunderbolt™ 3

5K Display with Thunderbolt™ 3

The LG UltraFine™ 5K display with Thunderbolt™ 3 port can transmit 5K video and data while simultaneously charging a new MacBook Pro (up to 85W) over a single cable. Plus, three USB-C downstream ports (USB 5 Gbps) let you connect additional devices as needed.¹

How to Connect the LG UltraFine 5K Display via Thunderbolt™ 3 cable

Recommended Connection with UltraFine 5K Display

Recommended Connection with UltraFine 5K Display

1. 13”/ 15” New MacBook Pro (Late 2016)
Check your release date of Mac devices

2. macOS Sierra 10.12.2 or later
Check your macOS version

3. Use enclosed ‘Thunderbolt™ 3 cable’ in the box
The Thunderbolt 3 Cable has ‘Thunderbolt™ 3 mark’ on the cable.

How to Connect LG UltraFine 5K Display with Your Mac

We recommend that you use the LG UltraFine 5K Display as a second monitor with Mac mini and Mac Pro, as the display might not turn on until you boot into macOS. As a result, pre-boot features such as Boot Picker and macOS Recovery might not be available on the display.

How to Connect LG UltraFine 5K Display with Your Mac
Ultimate Visibility

Ultimate Visibility

The LG UltraFine™ 5K display reaches a brightness of 500cd/m² and can express a wide range of color and contrast. You can experience vivid, lifelike images on a 5K screen, which provides a more natural representation.²

Consistent Color and Clarity

Consistent Color and Clarity

This 5K high-definition monitor with IPS minimizes color shift and delivers detailed, accurate images on the UltraFine™ 5K screen. Color is consistent from edge to edge.

Clear Communication and Entertainment

Clear Communication and Entertainment

The LG UltraFine™ 5K display has an internal webcam and responsive speakers/microphone that are perfectly suited to entertainment and communication, allowing you to watch movies, and video chat.³

Easy Display Control with macOS

Easy Display Control with macOS

Detailed control of display settings such as brightness can be done using macOS without the need to use any physical buttons.

Multi-Function Screen Manager

Multi-Function Screen Manager

The LG Screen Manager has been optimized for macOS to provide a variety of multi-screen options. For example, it can automatically divide the screen into two to four frames, according to users’ specific needs.

Convenient Adjustable Display Stand

Convenient Adjustable Display Stand

LG UltraFine™ 5K displays have convenient height/tilt adjustment. Users can customize the display height to create a more personal, comfortable workstation, or easily wall-mount the display with the use of a VESA mount bracket.⁴

ENERGY STAR® Qualified


ENERGY STAR® certified monitors meet stringent energy efficiency requirements set by the US Environmental Protection Agency in On, Sleep, and Off Modes. On average, monitors that have earned the ENERGY STAR® are 25% more energy efficient than standard options.

Screen Size 27" Flat
Panel Type IPS
Color Gamut (CIE 1931) DCI-P3 99%
Color Depth (Number of Colors) 10bit(8bit + A-FRC)
Pixel Pitch (mm) 0.11685 mm x 0.11685 mm
Response Time 12ms / 14ms GTG
Refresh Rate H-Frequency: 30~178kHz V-Frequency: 48~60Hz
Resolution 5120 x 2880
Brightness 500 nits
Contrast Ratio 1200:1
Viewing Angle 178 / 178
Surface Treatment Anti-glare, 2H
Thunderbolt 3 Yes(x1), 5K@60Hz, USB-C
Type Stereo Speakers
Audio Output 5Wx2 77dB (Based on LG Standard)
Type 200W built-in Power
Input 100~240V, 50/60Hz
Normal On (EPA) 140W
Power Save/Sleep Mode (Max.) 1.2W
DC Off (Max.) 0.5W
USB Up 1 upstream (Thunderbolt3)
USB port 3 downstream (USB-C)
HDCP HDCP1.4 / 2.2
Camera Yes
Mic Yes
Ambient Light Sensor Yes
Base Detachable Yes (One touch release button)
Tilt (Angle) Yes (Angle -5~25 degree)
Height (mm) Yes (range 0~110mm)
With Stand (WxHxD) 24.63" x 18.28" x 9.44"
Without Stand (WxHxD) 24.63" x 14.77" x 2.12"
Shipping Dimensions (WxHxD) 29.25" x 22.83" x 12.40"
With Stand Weight 18.74 lbs
Without Stand Weight 14.11 lbs
Shipping Weight 29.76 lbs
VESA® Size (mm) 100 x 100
Power Cord
Thunderbolt3 Cable Yes (Active Cable, 2.0m)
Easy Setup Guide Yes
Guides on Using Product Functions Yes
VESA design cover Yes
S/W Install CD Web Download
UL(cUL) Yes
CB Yes
KC Yes
EPA7.0 Yes
Thunderbolt3 Yes
Limited Warranty 1 Year Parts and Labor
UPC 719192613584

What People Are Saying

Rated 4 out of 5 by from Great Display I was a little concern when I purchased this monitor because of all the bad reviews, but I have seen them at the Apple store and was always amazing with the screen. The price is a little steep so I decided to buy used. After some research I was aware the issue with the shielding was resolved in February of 2017 so I look for monitors that were manufactured for that date going forward. Mine has a date of October of 2017 and the box show a square which is also another indicator that this is a monitor with the shielding issue fixed. So far I have had no issues with the ones reported on the earlier reviews. No Wi-Fi issue, no missing mouse pointer, and always wakes up from a sleep and it hasn't report my MBP. To my surprises, I have Windows Laptop Gaming Legion Y720 that has a USB-C connector and was able to use the monitor at 5K resolution. So far happy with the monitor, only wish it had more than just one usb-c for video input.
Date published: 2018-02-18
Rated 4 out of 5 by from Outstanding Resolution The display is beautiful. Super sharp and crisp. The management software works great as well. I was concerned that 27” wouldn’t be enough space but it works just fine. My only criticism is the number of input ports. HDMI, and USB-3 would be nice.
Date published: 2018-02-07
Rated 2 out of 5 by from OK Picture - but not a patch on the LG UltraFine 4 I bought this monitor about 6 months ago to use with my 2017 MacBook Pro. I initially thought it was "OK". But then I bought the LG UltraFine 4k 21" to use as a second monitor. The 4k 21", despite being considerably cheaper and is far superior. Whiter whites, deeper blacks and text is really sharp. I don't like using the 27" 5k now - as the picture just simply isn't as good. LG support tell me the picture quality should be the same if not better - but that is definitely not the case. Checked firmware and all up to date etc. I would not recommend the 5K 27" - but I would recommend 4k 21". Andrew
Date published: 2018-01-19
Rated 5 out of 5 by from Wow! Beautiful, stunning monitor when paired with my 2017 15-inch MBP; it works perfectly! I really feel like I have a solid iMac-like display while I am at home, yet I can still take my computer anywhere if needed. I have this display now for over a month and it just continues to work beautifully. The colors are stunning and vibrant; I cannot tell the difference between this and an iMac 5K retina display; maybe if they were side-by-side. The easy connectivity with one USB-C is awesome, perfect for clean setups. Yes, initially these monitors had some issues with wifi/routers being nearby, but with the new shielding this is an awesome display. I still would like to see more ports , which is the only real downside to this monitor in my opinion, however, this is still a beast and well worth it.
Date published: 2018-01-12
Rated 4 out of 5 by from Almost 100% Purchased this as a second monitor to my 27" 5K iMac. I read where the first 27" LG 5K had problems. Hopefully they ironed out the bugs in this one. I've had it for about a month and so far so good. The only initial issue I had was when I set it up. Instructions were VERY POOR! It said to bring up the contrast. There is no contrast adjustment. I was trying to get it to match my 5K iMac but it's not quite 100%. So I still rely on my iMac for any final photos. Unfortunately, there is no other 27" 5K monitor to choose from that is compatible with my iMac. I guess that's why it's so expensive.
Date published: 2017-10-31
Rated 3 out of 5 by from Beautiful monitor Looks great feels great and performed fine until about two weeks ago. Would not come one. Sent it back for repairs. Waiting on the resluts.
Date published: 2017-10-29
Rated 1 out of 5 by from Unable to use in portrait/vertical mode I am unable to use this monitor in portrait/vertical mode and that's ridiculous. If I run bootcamp I can, but it won't work in macOS. This monitor would be perfect if they'd allow this to be done in macOS, but until they do I would not recommend purchasing this monitor.
Date published: 2017-10-20
Rated 5 out of 5 by from Best Display I've ever used The quality of the LG 5K UltraFine is phenomenal. The vibrance and richness of the colors, are second to none, period. I wish it worked with non-Apple computers, but that's not a deal breaker for me since all my computers are Macs anyway. If you're a Mac user who needs a secondary (or primary, depending on what computer you have), this is the monitor you should purchase. It may be a little expensive, but the quality makes up for that.
Date published: 2017-10-19
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We're here to support you with our product.

View 27MD5KA-B Product Support

Contact us for any support inquiries.


Ask your questions. Share your answers.
Please first review the detailed product information and help guides in the Product Support section for this product prior to posting a question.

Will this screen work in portrait format. Since I am a photographer and I have clients asking for book and magazine covers, can it swivel? will it give the same quality as if it is in landscape mode?

Asked by: Gerald Cummins
The version of the LG 27" Class UltraFine™ 5K IPS LED Monitor (27" Diagonal), Model # 27MD5KA that is marketed and sold in the U.S. is not designed to work in portrait format. It has a convenient height/tilt adjustment, but if you need this to function in portrait format, you may need software that allows you to do that. Some Windows Operating Systems allow you to right-click the desktop and select 'Screen Resolution', then navigate to 'Orientation'. By clicking on the drop-down menu you'll find options for Landscape, Portrait, Landscape (flipped) and Portrait (flipped)...^IFV
Answered by: LGJoel
Date published: 2018-01-22

I am curious if it would be possible to have the video display work through connecting to the thunderport 3 port on the Lacie 6Big external drive? I have a Thunderport 3 dock that allows 5K pass-through, no USB-C ports on the monitor.

Asked by: lifestar
In order for you to get a display on the monitor, it should be a straight connection from the computer going to the monitor like thunderbolt 3.0 to thunderbolt 3.0. Its not guaranteed to get a video in that setup. For additional assistance, give us a call at 1-800-243-0000 or via our Live Chat services at ^AC
Answered by: amber
Date published: 2017-11-17

How do I use the monitor's webcam for facetime when my mac is plugged in but the cover is closed?

Asked by: Matt212
More information would be needed about the MacBook and the setup to better assist. Please contact our customer Interactive Center at 800-243-0000 for additional support.
Answered by: NeilE
Date published: 2017-09-28

How do you get the flashing to stop, it's really annoying.  It only happens once in a while but it must stop!!!!

Asked by: MacUser1972
Many *many* Macs on Sierra have a problem with external monitors flashing, and/or going to black for a fraction of a second to multiple seconds. I encountered it on my brand new Macbook Pro 2016 15" , with both HDMI and DVI. For me, uninstalling SnapZPro seems to have been the solution.
Answered by: sieler
Date published: 2017-05-29

What is the resolution of the camera?

Asked by: imabuddha
Our offices, in the United States, do not have product information for Japan. In order to obtain such information, it is recommended to check our subsidiary’s website, at
Answered by: NeilE
Date published: 2017-07-20

i was confused by the apple store sevicer to use this for an mac air. so do i have any solution? or is there any way to change the output thunderbolt3 into HDIM without any influnse of the display?

Asked by: tq00i8e
The MacBook Air is not supported on a 27" display, because the MBA doesn't have the resolution support. Native resolution for an Early 2015 MBA would be 1440x900, for external display support it can handle a 3840x2160 which would be 4k.This 5k display is 5120x2880. So MBA is NOT compatible.
Answered by: MissKris
Date published: 2017-07-18

Is it 99% AdobeRGB?

Asked by: mltoris
Our offices, in the United States, do not have product information for Germany. In order to obtain such information, it is recommended to check our subsidiary’s website, at
Answered by: NeilE
Date published: 2017-10-07

wen buying this monitor at this time, will it be send or come with the upgraded hardware?

Asked by: sybe
Our offices, in the United States, do not have product information for the Netherlands. In order to obtain such information, it is recommended to check our subsidiary’s website, at
Answered by: NeilE
Date published: 2017-08-29
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