iMac 27 inch 2020 - Screen Glitch (Random Lines Appear on Screen)

Apple admitting even semi-pubicly (that is, over the phone with AppleCare) that they have a hardware issue usually takes months if not longer compared with when they identify the issue and apply a fix at the factory. So maybe there's a chance units rolling off the assembly lines already have a fix.... I hope.

Could people who have posted (and will post) with this issue please say, as Mr. Bienick did, how much graphics memory they ordered with the their 5700XT? Thanks.

Same here. I cancelled my order before it was too late. I called apple customer services today explaining why I cancelled and my concerns, apparently they have no knowledge of this issue. I told them that plenty of people are having these issue and I won't be buying until I know it is sorted out.

Same here- Civilization VI is crashing consistently on my new iMac. The crashes are quite spectacular, making the screen look like its shattered & requiring a hard reboot.

iMac: 27-inch 2020

・10-core Core i9

・32GB RAM

・Radeon Pro 5700 XT 16GB

Me too! I also cancelled my order before it went to shipping status. I concluded that the issue is too wide spread and being experienced by lots of new iMac 2020 5700XT users. I called Apple and couldn’t believe they haven’t heard about the issue and told them why I cancelled the order and that many other customers are doing the same until it gets sorted.

I didn’t see it at all yesterday and I don’t see large lines like the screenshot somebody posted. Mine was a small line that flickered randomly on the screen when I first set the computer up and it was being restarted.

Be careful of interpreting statistics of such small numbers. It could be, as the raw numbers suggest, that 2/3 of iMac 2020. 5700 XT's suffer from this problem.... or it could be that only 37 out of hundreds of owners could be arsed to respond, because the rest don't have a problem. Self-selection is usually a red flag in validating statistics.

I think that every mac with this configuration suffers the glitch. It is just a matter of time before one sees it or pays attention to it. Assemblyline is for every device the same, software or hardware, so logically it should be in every. Or else there would be a computerpart , from which the produced serie contains faulty ones now and then. But this is hard to trace in this case.

Cinebench worked fine on my new 2020 27" iMac together with a few other benchmarks apps I tried (don't remember their names) - only when playing Civilization VI and only when in full screen the whole Mac OS system crashes on me.

I know right, I'm in the same boat. I am willing to part with my hard earned cash and this is the only hurdle that is preventing me from doing so. I'm in need of an upgrade from my old 2012 27in imac.

I'm in contact with Apple Germany to provide them with more details, screenshots and video / screen recordings. However this stupid white line glitch didn't appear for an entire session right now. I bet once I don't capture the screen it appears within seconds next time I restart :D Hard to replicate this issue :O or do anyone knows of a safe way to provoke the iMac to do this?

Same issue here, I already sold my previous iMac. If I return this one which I use for professional purposes, I won't have something to work with. I'm really disappointed even though the unit is a beast of a machine. I edit a lot of 4K video and it's an absolutely pleasure to use in FCPX, but these graphic glitches are annoying. I also noticed the windows rounding issue as well earlier today.

I was literally going to hit the buy button on this machine today... not now until this is addressed or fixed.

I am not spending thousands of dollars and a ton of time doing anything if it is a hardware issue.

According to macrumors forum most think its a software issue which is good.

But we need an answer or at least something from Apple saying its being worked on

I completely agree! I'm surprised by the silence from Apple. They need to release a statement to let us know that the issue is under investigation... as there are many customers who are holding off buying the top of the line iMac 2020 until the issue has been acknowledged by Apple.

I cancelled my iMac 2020 5700XT order just in time before it shipped, and I won't re-order until this issue has been identified and fixed.

i really can not believe that Apple was unaware of this glitch. In my opinion , they were on a tight deathline with the outroll of their arm Macs on the way and that they absolutely wanted to launch the last intel Mac before that. Maybe they gambled that Mac buyers are that loyal to the marque that they would swallow the glitch. This is the first time I know that there is such a reaction of users and potential buyers on an error of the company. Are we finally become grown-up ?