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At 219 pixels per inch to deliver 4K resolution (4069 x 2304 at 21.5”), the LG UltraFine™ display lets you experience the definition and detail of a Mac on a large 4K screen.
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 4K display.
One USB-C port can replace multiple ports for transmitting data, 4K video and power charging. It is also able to simultaneously charge mobile devices while charging your MacBook (up to 60W). In addition, three USB-C downstream ports (480Mbps) let you connect additional devices.¹
The LG UltraFine™ 4K 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 4K screen, which provides a more natural representation.²
Consistent Color and Clarity
This 4K high-definition monitor with IPS minimizes color shift and delivers detailed, accurate images on the UltraFine™ 4K screen. Color is consistent from edge to edge.
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
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
LG UltraFine™ 4K 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.³
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.
Rated 5 out of
I brought this Monitor because of Quality, features and adaptability with my iMac. But unable to connect another laptop with HDMI
Date published: 2019-07-23
Rated 3 out of
Great, but won't wake up after sleepI got these via Woot, and I've attempted to swap to a thunderbolt cable instead of the supplied USB-C hoping it would solve the issue.
Result is I constantly have to pull cables out of the MacBook and plug them back in. This resets brightness and in general is pretty annoying.
I see people online state cables, or firmware updates, but after almost 8 months now I've had no luck.
I have no idea if its Mojave power issues or the monitors. Either way its 2 step backwards and one step forward.
Date published: 2019-05-26
Rated 4 out of
Good 2nd monitor for 2017 iMacI mounted it on a vesa arm and we are using them side to side. Color and detail match the 21 inch 2017 iMac almost perfectly. Speakers were a surprise bonus. Only complaint is that the usb-c cable was not long enough to hide by passing down the channels in the two arms. However, it probably would be if you are using a double monitor vesa mount.
Ask your questions. Share your answers. Please review the detailed product information and help guides in the Product Support section for this product prior to posting a question.
How do I connect speakers to this monitor?
Asked by: Bobec
The unit has two very nice speakers built into it - I know since I'm using them daily!
Answered by: dhoerl
Date published: 2019-06-11
Hi, does this monitor have an input list for multiple devices in it's menu, in case I want to connect my iMac and my Xbox One X at the same time and switch between the 2, if so, would they both be displaying 4K resolution? Thanks.
Asked by: Simster
The LG 22" Class UltraFine™ 4K IPS LED Monitor (21.5" Diagonal), Model # 22MD4KA has a USB-C port and three USB-C downstream ports (480Mbps) that let you connect additional devices...^IFV
Answered by: Ivanf
Date published: 2019-03-19
Can this monitor be used in Europe without a power converter? I'm assuming this is the case because the specs say 100-240V, but I'd like to know for sure before I move.
Asked by: Lizzzzz
HI Lizzzzz. The LG 22" Class UltraFine™ 4K IPS LED Monitor (21.5" Diagonal), Model # 22MKD4KA has a power rating of 100 - 240 V~ 50/60 Hz 1.4 A, so you will not need a step-down converter to use it abroad. Depending on where in Europe you move to, you will need an adapter for the plug on the monitor's power cord to fit into the electrical sockets they use since they use different types of sockets from those used in the U.S...^IFV
Answered by: LGJoel
Date published: 2018-12-05
I installed the LG Screen Manager today from the App store, and updated the firmware of the display. However I don't have the "screen split" tab/functionality in the LG Screen Manager.
Is this expected? Is there a missing step to set this up?
Asked by: emirpprime
The LG Screen Manager has been optimized for MacOS to provide a variety of multi-screen options and should enable you to automatically divide the screen on the LG 22" Class UltraFine™ 4K IPS LED Monitor (21.5" Diagonal), Model # 22MD4KA-B into two or four frames according to your specific needs. Regrettably, we are not familiar with which app store you downloaded the software from. There should be a download link on the monitor's support page on our site. You may want to download the software from there. The U.K. site may be different from that in the U.S. and if you need assistance, please contact the Support Center in the U.K., https://www.lg.com/uk for assistance...^IFV
Answered by: LGJoel
Date published: 2018-11-01
Are there plans for a non USB-C version of this display? Would love to use this with the previous generation of MacBook Pros.
Asked by: Jeff Miller
Regrettably, we do not have any information on if LG will collaborate with Apple to design another monitor like the LG 22" Class UltraFine™ 4K IPS LED Monitor (21.5" Diagonal), Model # 22MD4KA-B that does not feature USB-C ports. There should be adapters available that you can use to connect to the USB-C port on the monitor...^IFV
Answered by: LGJoel
Date published: 2018-07-06
Could I use this monitor for an win 10 computer by mini dp?
I mean input is dp alt.mode usb 3.1 Gen1, is there any adapter to make this happen, from minidp to usb 3.1. Thanks.
Asked by: frankshu
Regrettably, LG does not manufacture adapters that you can use to connect to the USB-C or HDMI ports on LG 22" Class UltraFine™ 4K IPS LED Monitor (21.5" Diagonal), Model # 22MD4KA. There should be a variety of adapters available and you should be able to find those through online sites or retailers that sell cables or computers...^IFV
Answered by: LGJoel
Date published: 2018-04-12
Does the ambient light sensor work at all? I have been unable to find any report of its usage and it does not work for me in Sierra. Can you specify a combination of Mac and MacOS where it can actually be used to automatically adjust the brightness?
Asked by: Lee3
The Ambient Light Sensor (ALS) should work fine. To find how it works, open System Preferences and select Displays. Enable "Automatically adjust brightness" and the computer will use the ambient light sensor to automatically adjust the brightness. You can also check if Mac OS is updated. The ALS operates in accordance with Mac OS and some Mac OS doesn’t support the display ALS. If all mentioned above don't work, try to place your hand on the ambient light sensor and check if your screen will turn black. If not, then the ambient light sensor might not be working. ^AC
Answered by: amber
Date published: 2017-12-27
How can I adjust the brightness of the ultrafine 4K in Windows? This only seems to work in macOS. In Windows I can only change the brightness of my MacBook's screen. The slider for the ultrafine is missing.
Asked by: Lee3
This monitor is designed for Mac OS only. To change the brightness, it will be thru the settings of Mac. ^AC
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Browse all of LG’s innovative, state-of-the-art computer monitors, including:
5K monitors. Take it up a notch with the LG UltraFine monitor, boasting an immersive 27-inch display with 5120 x 2880 resolution and 218 ppi that lets you experience the beauty of a MacBook or MacBook Pro on a large 5K screen. Add to that an unbelievable color spectrum of P3 99% and you’ll be editing and enjoying high-res photos like never before. Too much for you to handle? There’s an impressive 21.5-inch Mac-friendly 4K version as well.
21:9 Curved UltraWide monitors: These high-performance, feature-packed monitors are the ultimate multitaskers. Featuring UltraWide 21:9 resolution, 4-Screen Split, Mac®-compatibility, Dual Linkup and stunning Full HD 1080p. The perfect solutions for designers, photographers, gamers and other professionals who need more room for their big ideas.
IPS monitors: Boasting true-to-life colors, IPS computer monitors lessen color loss and help to keep colors consistent at virtually any angle. The LED backlighting delivers deep black levels and rich colors for an amazing contrast and color detail.
4K monitors: Digital cinema 4K resolution provides crisp images with a significant number of pixels on screen. 4K resolution displays over four times the resolution of standard 1920 x1080 FHD, and over half a million more pixels than UHD resolution, which means you can view even the finest details clearly.
Gaming monitors: Get panoramic multitasking and immersive gaming with features like a 144Hz refresh rate -- the highest of any gaming monitor -- plus a response time of less than 1ms (1/1000 of a second) in Motion 240 Mode. It’s the ideal monitor for real-time strategy and first-person shooters. Dynamic Action Sync lets you catch every single moment in real time, while LG’s Black Stabilizer brightens dark scenes so the enemy can’t hide. Get true-to-life color and brilliant clarity from virtually every angle.
TV monitors: Get Full HD 1080p entertainment from the TV, as well as your computer. With features like a built-in digital tuner and Dolby Surround sound, LG TV monitors can bring your favorite movies and TV shows to life, along with your favorite online content and games.
Discover the latest innovations in performance and technology with gaming, TV and computer monitors from LG, including 4K, ultra-wide, IPS, LED and more. See how we’re making life good.