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@JohnDDuncanIII
Created March 12, 2025 00:18
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lg c1 macOS 120hz
The new "macOS" product variation of https://www.amazon.com/dp/B0DCN798Y1 allows plug-and-play 4k 120hz 12-bit RGB Full Range HDR10 on my M1 MacBook Pro using an LG C1 through the "Amazon Basics High-Speed HDMI Cable (48Gbps, 8K/60Hz ) - 3 Feet, White" hdmi cable (https://www.amazon.com/gp/product/B08BS181P2).
For optimal performance and lowest possible latency, I would also recommend:
1) Installing BetterDisplay (https://github.com/waydabber/BetterDisplay) — I did this through homebrew ($ brew install --cask BetterDisplay; open -a BetterDisplay)
2) Enabling BetterDisplay's Settings => Displays => LG TV SSCR2 => Edit display role setting, which forces macOS to treat the C1 as a monitor rather than a TV, meaning that Night Shift and True Tone will work.
3) Disabling BetterDisplay's Color Mode => GPU Dithering in the BetterDisplay menu bar dropdown.
4) Downloading Quartz Debug from "Additional Tools for Xcode 16.2" (https://download.developer.apple.com/Developer_Tools/Additional_Tools_for_Xcode_16.2/Additional_Tools_for_Xcode_16.2.dmg), then disabling Quartz Debug.app => ⌘1 => Enable vertical sync
5) Turning on the LG C1 Game Optimizer => VRR & G-Sync setting
https://www.cablematters.com/Blog/HDMI/how-to-get-4k120hz-with-mac
https://kb.cablematters.com/index.php?View=entry&EntryID=147
https://forums.macrumors.com/threads/dp-usb-c-thunderbolt-to-hdmi-2-1-4k-120hz-rgb4-4-4-10b-hdr-with-apple-silicon-m1-m4-now-possible.2381664/
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