ddcctl vs LG OnScreen Control

ddcctl is a free GPLv3 open-source command-line utility for adjusting external monitor controls from the macOS shell. Its primary controls are brightness and contrast. Depending on monitor firmware, it may also switch input source, change built-in speaker volume or RGB colors, select color presets, and reset settings. The stated scope is macOS, Macintosh hardware, and DDC-controlled monitors. Installation is available through Homebrew, downloadable release binaries, or a source build; building requires Xcode and running make. Example scripts can be invoked by Alfred, ControlPlane, or Karabiner to switch presets. The project describes itself as a personal utility in maintenance mode and asks users to debug their own issues. Its maker says there is no time to triage new issues or support non-bugs, and no support or discussion forum is planned. Verification is manual, with no CI connected to real Macs and monitors. The releases page lists v1 as the latest release. The listed controls include DDC/CI, input switching, and command-line access.

LG OnScreen Control is a desktop utility for managing features on certain LG monitors from Windows or macOS. It offers Screen Split, which divides the display into regions, and controls for brightness, contrast, and other monitor settings. My application Preset can change picture mode when you click a chosen application window, while Game mode settings let you adjust game-related monitor settings. The 5:9 Preview feature displays an application in a 5:9 area that you can move to a preferred position. The app can also update monitor firmware. A USB connection is required for settings and firmware updates; firmware updates also need internet access and a supported USB cable. Support depends on the monitor model, so LG advises checking its owner’s manual. The app does not support the PC’s Duplicate display setting; LG advises using Extend mode if its menu does not appear. A non-genuine cable or adapter can prevent DDC/CI communication, and using a third-party monitor may limit some features. The download is free for supported models.