About the LG UltraFine 4K Display
The 23.7-inch LG UltraFine 4K Display features a 3840 x 2160 resolution, a P3 color gamut, 500 nits of brightness, and built-in stereo speakers. Integration with macOS lets you control your display's volume and brightness without the need for physical buttons on the display.
If you connect the display using the Thunderbolt 3 (USB-C) 
cable (included), it provides up to 85W of charging power to your MacBook Pro or MacBook Air. The display has two Thunderbolt 3 (USB-C) ports, and you can use one to connect to another 4K display.
If you connect the display using a single USB-C 
cable (included), it provides up to 85W of charging power to your MacBook or iPad Pro. The display has three USB-C ports and two Thunderbolt 3 (USB-C) ports that function as downstream USB-C ports (5Gbps) and offer additional connectivity and power to compatible devices and accessories.
System requirements and compatible Mac models
The LG UltraFine 4K Display requires a Mac with a USB-C port or Thunderbolt 3 (USB-C) port running macOS Mojave 10.14.5 or later, or an iPad Pro with a USB-C port.
The LG UltraFine 4K Display supports a resolution of 3840 x 2160 at 60Hz on these devices:
- iMac Pro
Learn how to connect multiple displays to your iMac Pro. - iMac introduced in 2017 or later
- Mac mini introduced in 2018
Learn how to connect multiple displays to your Mac mini (2018)
- MacBook Pro introduced in 2016 or later
- MacBook Air introduced in 2018
- MacBook introduced in 2015 or later
- iPad Pro with USB-C
- Mac computers with Thunderbolt 2 ports using the Thunderbolt 3 to Thunderbolt 2 adapter
Learn how to adjust your display’s resolution.
If you have issues connecting the display
- Get help with video issues if you still don't see an image when using the correct cable.
- If the LG UltraFine 4K Display doesn't power on or you don't see an image after following the steps in the article above, contact LG to get service for your display.