solved: LG 32UL950 wrong size reported (dpi / edid)


macrumors newbie
Original poster
Jan 24, 2020
Solved - just as a side note:

When attaching a 31.5" LG 32UL950 to a Mac, the reported screen size is 27". While this does not affect the resolution, it affects the actual screen size of items scaled to "100%" in graphic applications, such as Acrobat Reader, Indesign etc. A nightmare when working on print.

It turned out that the LG has buggy EDID data, reporting a screen size of 600 x 340mm. After correcting the EDID and creating an override file, everything works now as expected. The LG display is correctly reported as 31.5" and all graphic applications scale fine.

See override file attached. It goes to /System/Library/Displays/Contents/Resources/Overrides

Note that on Catalina the install process is a bit tricky:
link on


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