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Please select GPU type and if you see the flickering glitch on the display:


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    215

Hechicero

macrumors newbie
Sep 9, 2020
15
10
Portland, OR
How often does this glitch appears on your sceeen in an hour or day? I’ve seen some videos where it keeps appearing again again and again like 20 times in only one minit.
In my case it’s just from 5-10 times in a day as long as I can see them. Any idea why some experience more offen than others?
TK
It has been most obviously noticeable for me when the migration assistant application is open. I’ve definitely noticed it many several times since, but most of the time by the time I notice it and look to that area of the screen it’s gone. For me it’s more annoying because I know it’s happening and it shouldn’t be. Otherwise this machine has been an amazing upgrade for me.
Interestingly when I have been working in Lightroom for hours on end with the Lightroom window expanded to the full screen real-estate I haven’t noticed it once so far. Could be just blinking though I suppose... my main concern for the glitch was that it would be unbearable while doing photo of video work.
 

Schnauzer World

macrumors regular
Dec 25, 2018
102
41
It has been most obviously noticeable for me if the migration assistant application is open. I’ve definitely noticed it many several times since, but most of the time by the time I notice it and look to that area of the screen it’s gone. For me it’s more annoying because I know it’s happening and it shouldn’t be. Otherwise this machine has been an amazing upgrade for me.
Interestingly when I have been working in Lightroom for hours on end with the Lightroom window expanded to the full screen real-estate I haven’t noticed it once so far. Could be just blinking though I suppose... my main concern for the glitch was that it would be unbearable while doing photo of video work.

Are you going to keep it or request a return?
 

dspdoc

macrumors 68000
Mar 7, 2017
1,962
2,379
For me it’s more annoying because I know it’s happening and it shouldn’t be. Otherwise this machine has been an amazing upgrade for me.
Interestingly when I have been working in Lightroom for hours on end with the Lightroom window expanded to the full screen real-estate I haven’t noticed it once so far. Could be just blinking though I suppose... my main concern for the glitch was that it would be unbearable while doing photo of video work.
This! ?
 
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Hechicero

macrumors newbie
Sep 9, 2020
15
10
Portland, OR
Are you going to keep it or request a return?
The trouble is that I got my machine via a friend who works at Apple with their friends and family discount. Not sure how that works with a potential return (Somehow I doubt it plays nicely, similar to the education one above). I was convinced to purchase Apple Care for it though (normally wouldn’t) largely because none of the parts are user replaceable like the 2011 iMac I’m coming from before. So in the end I feel like I’m in a decent place to ride out the potential fix or have Apple deal with it if they can’t. Found out there was a GPU related glitch several days after I pulled the trigger. Plus my old system is not really usable for what I need it to do (because of GPU issues) so I need a working machine.
 
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Schnauzer World

macrumors regular
Dec 25, 2018
102
41
The trouble is that I got my machine via a friend who works at Apple with their friends and family discount. Not sure how that works with a potential return (Somehow I doubt it plays nicely, similar to the education one above). I was convinced to purchase Apple Care for it though (normally wouldn’t) largely because none of the parts are user replaceable like the 2011 iMac I’m coming from before. So in the end I feel like I’m in a decent place to ride out the potential fix or have Apple deal with it if they can’t. Found out there was a GPU related glitch several days after I pulled the trigger. Plus my old system is not really usable for what I need it to do (because of GPU issues) so I need a working machine.

I might have to do the same (education discount) plus I really like the Airpods Pro and would hate to return them and I don't want to go back to Windows 10.
 

ADGrant

macrumors 68000
Mar 26, 2018
1,689
1,059
The trouble is that I got my machine via a friend who works at Apple with their friends and family discount. Not sure how that works with a potential return (Somehow I doubt it plays nicely, similar to the education one above). I was convinced to purchase Apple Care for it though (normally wouldn’t) largely because none of the parts are user replaceable like the 2011 iMac I’m coming from before. So in the end I feel like I’m in a decent place to ride out the potential fix or have Apple deal with it if they can’t. Found out there was a GPU related glitch several days after I pulled the trigger. Plus my old system is not really usable for what I need it to do (because of GPU issues) so I need a working machine.

This isn't aimed at you but I really don't understand why anyone would return a machine that is improving your productivity and reverting to a machine that is barely usable because of a GPU glitch that is not affecting you use of the machine. Yes its an annoying bug but my assumption is people bought these machines to get work done not to just look at and complain about (they have barely changed the design in 10 years).
 
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PieTunes

Contributor
May 6, 2016
1,017
1,880
San Diego, CA
I might have to do the same (education discount) plus I really like the Airpods Pro and would hate to return them and I don't want to go back to Windows 10.
For education purchases that include a free promotional product, from Apple's end, the two devices (iMac and AirPods) are invoiced separately so if you return the iMac, the refund amount would be less as it subtracts the cost of the AirPods. Basically you can keep your AirPods if you choose, you'll just be paying the full retail price for them.
 

dspdoc

macrumors 68000
Mar 7, 2017
1,962
2,379
This isn't aimed at you but I really don't understand why anyone would return a machine that is improving your productivity and reverting to a machine that is barely usable because of a GPU glitch that is not affecting you use of the machine. Yes its an annoying bug but my assumption is people bought these machines to get work done not to just look at and complain about (they have barely changed the design in 10 years).
Tolerance levels. Yours is obviously much higher. Some people are not ok with a $3k-$5k machine that has glitches it shouldn’t have. Simple. Not sure why you can’t get your head around the fact that not everyone reasons like you do.
 
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AZREOSpecialist

Suspended
Mar 15, 2009
2,354
1,280
Accessibility feature "Shake mouse pointer to locate" was activated by default on my iMac. Since most, if not all, glitching appears limited vertically to near the mouse pointer, I turned off the feature to see if it helps at all. I found the coincidence interesting.

Screen Shot 2020-09-13 at 9.23.12 AM.png


I don’t think it is out yet. This was mentioned yesterday. It doesn’t look very promising either since there is no mention of graphical fixes.
Apple doesn't always state what all was fixed in a given update, especially if it's something they don't want to acknowledge existed in the first place.
From past experience -- and I'm being careful how I phrase this, given growing cancel-culture -- but certain websites tread very carefully in terms of displeasing the source of sustenance.
Has nothing to do with "cancel culture". It has to do with having access. Bite the hand that feeds you and access disappears. This is why we no longer have objective reviews anywhere outside of Consumer Reports. Everyone else is financially beholden to someone who doesn't want the truth out there.
Steve just went crazy because the casing of the first Macintosh didn’t have cornerangels of exactly 90 degrees. Can you imagine how deep the company has sank.
To be fair, Jobs was an industrial design guy who cared far more about a product's physical design. Most of Apple's current products, except for Mac Pro, all use design language instituted under Jobs. Cook is not hands-on like this at all, but neither are most CEOs and their companies' products come out fine. It's inconceivable that the iMac team wasn't using their own products for weeks prior to general release. Apple knows about this glitch. It has to.
so I just wanted to get my money back, but apple apparently has its own tricks!
Spend $25 and file in your local small claims court. Apple will have to send a representative to answer your suit locally and it will be cheaper for Apple to refund your money.
 
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dspdoc

macrumors 68000
Mar 7, 2017
1,962
2,379
Accessibility feature "Shake mouse pointer to locate" was activated by default on my iMac. Since most, if not all, glitching appears limited vertically to where the mouse pointer appears to be I just turned off that feature to see if it helps at all. I found the coincidence interesting.
Doesn’t help. I turned that off immediately on both my machines.
 
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torifile

macrumors regular
Original poster
Aug 10, 2020
158
161
Tolerance levels. Yours is obviously much higher. Some people are not ok with a $3k-$5k machine that has glitches it shouldn’t have. Simple. Not sure why you can’t get your head around the fact that not everyone reasons like you do.
It’s not that our tolerance is much higher, it’s that yours is soooo incredibly low.
 

dspdoc

macrumors 68000
Mar 7, 2017
1,962
2,379
It’s not that our tolerance is much higher, it’s that yours is soooo incredibly low.
That’s your opinion. There are a lot of people like myself. Your statement is false when based on a totally subjective topic. There’s this thing called perspective and it is completely individual based.

Low tolerance = great products = hugely successful companies
 
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ADGrant

macrumors 68000
Mar 26, 2018
1,689
1,059
That’s your opinion. There are a lot of people like myself. Your statement is false when based on a totally subjective topic. There’s this thing called perspective and it is completely individual based.

Low tolerance = great products = hugely successful companies

So when did you return you 2020 iMac, what are you using instead?
 

dspdoc

macrumors 68000
Mar 7, 2017
1,962
2,379
So when did you return you 2020 iMac, what are you using instead?
My 2nd iMac is in the box sitting in the front room waiting for FedEx to pick it up tomorrow. I also have a 2019 Mac Pro. Had the 5700 card in that and it also has issues so I’ve switched to a Vega II.

I guess there’s something to be said for more mature ‘older tech’. I’ll take stability over cutting edge any day. I wouldn’t call the 5700 GPU ‘cutting edge’ seeing as it has been out for quite awhile. But apparently between AMD and Apple their engineers can’t seem to get the bugs ironed out.
 

LGR

macrumors regular
Feb 11, 2014
158
153
Portland, OR
It might not run in dual channel...

Here something might be helpful?

Should I just remove the two 4gb and have only the two 32gb instead?
Running geekbench with thentwo 4gb andmwithout then should let you know. Also run the mrmory speed sub test as part of NovaBench will tell you.
 

ADGrant

macrumors 68000
Mar 26, 2018
1,689
1,059
My 2nd iMac is in the box sitting in the front room waiting for FedEx to pick it up tomorrow. I also have a 2019 Mac Pro. Had the 5700 card in that and it also has issues so I’ve switched to a Vega II.

I guess there’s something to be said for more mature ‘older tech’. I’ll take stability over cutting edge any day. I wouldn’t call the 5700 GPU ‘cutting edge’ seeing as it has been out for quite awhile. But apparently between AMD and Apple their engineers can’t seem to get the bugs ironed out.

It seems the glitching is a problem with all Navi GPUs. I am surprised you bought an iMac if you already had the much better Mac Pro. Much more than I want to spend and I don't really have the room for it but it is undoubtedly a much better machine.
 

dspdoc

macrumors 68000
Mar 7, 2017
1,962
2,379
It seems the glitching is a problem with all Navi GPUs. I am surprised you bought an iMac if you already had the much better Mac Pro. Much more than I want to spend and I don't really have the room for it but it is undoubtedly a much better machine.
Honestly my plan was to get rid of the Mac Pro and just keep the iMac. I agree, Navi seems to be giving Apple fits.
 

LGR

macrumors regular
Feb 11, 2014
158
153
Portland, OR
Guys I'm facing a new problem with :mad: imac 2020. I can't return it, I initiated a refund on September 7 because of the problems I noticed and the fact that I am not satisfied with it and I consider it a marriage. Apple accepted the application. The Imac was purchased on a promotion for education - airpods were a gift,. So I received the return Number for airpods on September 8, but there is nothing for the Imac a week later. I called two more times and tried to find out the reason, they said that there was some kind of system failure, and so they can't do it yet, and they can't clearly answer when-what nonsense?! I want my money back! By the way, I never received an invoice for Imac-which was delivered to me on September 1, it's been 13 days ! This is simply Impossible, just a terrible service, it feels like Apple is doing all this on purpose, finding reasons to create extra problems for the buyer! I do not know what to do, now I need lawyers or a court to do what I have the right under the law? What the **** ! Who has experienced this attitude?
Were you charged for the imac?
 
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