White Horizontal Line on new 2020 iMac with AMD Radeon Pro 5700 XT 16 GB graphics card

I received my new 2020 iMac a week ago. I'm seeing a white HORIZONTAL LINE flash mid-way up the screen. My iMac has the AMD Radeon Pro 5700 XT 16 GB graphics card.


This happens randomly, a couple times per day.


Others have reported the same issue.

https://forums.macrumors.com/threads/imac-2020-5700xt-graphical-glitch.2251034/page-3?post=28808230#post-28808230



iMac 27″, macOS 10.15

Posted on Aug 23, 2020 7:33 AM

Reply
25 replies

Sep 20, 2020 3:21 AM in response to Jon Mandelbaum

got mine on mid-August , had the issues and graphic crash on some apps. returned and they sent a replacement, the replacement freeze twice and same horizontal lines ( lighting ) decided to returned and not get replacement at the moment, I will wait if there is some fix or apple do something about this, I had bad experience back in time to 2011 graphics issues on 27'' mine failed , got fixed in 2014 by recall program and fail again after 2 years, spend a lot money on this model and no want same experience as 2011 model. for that reason learn, return, wait and buy again when is fixed

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White Horizontal Line on new 2020 iMac with AMD Radeon Pro 5700 XT 16 GB graphics card

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