What scaled resolutions are available to use on this monitor?

LG UltraFine 4K Display

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3 Answers from the Community

  • Answer

    The normal resolution options are:

    1504x846
    1920x1080
    2304x1296
    2560x1440
    3008x1692

    with "Default for display" being 1920x1080

    However, by holding down the option key when you select the "Scaled" radio button, you then have the following resolutions available:

    3840x2160
    3360x1890
    3200x1800
    3008x1692
    2560x1440
    2304x1296
    2048x1152
    1920x1080
    1680x945
    1600x900
    1504x846
    1280x720
    1152x648

    which is a lot!

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  • The timings supported by the display are listed in the manual which you can download from the LG website.

    Scaled resolutions in MacOS work be scaling a frame buffer to a base resolution. The base resolution is usually the max resolution of the display (3840x2160 in this case). The display only affects the base resolution and the timings.

    The scaled resolution refers to the dimensions of the frame buffer. These are created by the graphics drivers so it depends on the macOS version and the GPU that the display is connected to (Intel, AMD, and Nvidia have different frame buffer max sizes).

    Scaled resolutions can be smaller (1920x1080) or larger (5120x2880) than the base resolution. Scaled resolutions that are larger than a certain size also give a Retina (HiDPI or "Looks like") resolution. For example, a 5120x2880 scaled resolution also gives a 2560x1440 HiDPI resolution. When using a HiDPI resolution, UI elements are drawn twice as high and twice as wide as usual.

    You can see both low resolutions (non-HiDPI) and HiDPI resolutions by holding the Option key and clicking "Scaled" in the Displays preferences.

    You can add scaled resolutions and change the base resolution using a program like SwitchResX.

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  • Since I can’t edit my review I thought I would add this here.

    In my review I said I use the native resolution. That is incorrect. I am scaling to 2304X1296 which seems perfect as far as UI, screen real estate and sharpness. I have the LG 24” connected to a 2018 Mac Mini with 32GB of RAM.

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