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Red Hue on left and right side of iMAC late 2015 5k Retina screen

Hi I have the same issue with the left and right side of the imac 5k screen being really off in color on both side of the screen. Its a late 2015 model and its 2023 now so I assume the warranty is expired. This pc has not been left on for long periods and in for light general purpose personal use. Night mode makes it worse and without night mode its still noticable. Any ideas? Thank you


Similar / same to this issue Reddish/Pinkish Hue on All Sides of 5K iM… - Apple Community


iMac 27″, macOS 12.7

Posted on Dec 26, 2023 8:25 PM

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3 replies

Dec 27, 2023 7:53 AM in response to hjitmm

In addition to turning off Night Shift.


1) Go to Apple > System Preferences > Accessibility > Display > check Reduce Transparency and make sure that the Contrast slider is set to Normal.


2) Go Apple > System Preferences Desktop & Screen Saver > Desktop > select a different background image or photo, anything beside white or light gray background.

Red Hue on left and right side of iMAC late 2015 5k Retina screen

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