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WilDieteren Author

Level 1

24 points

multi colored screen when shutting down iMac

All,

Since upgrading to macOS Sierra, my iMac shows a multi colored screen when I shut down, see image below.

The screen shows up immediately after shut down starts, remains for a few seconds, than turns black and shuts down. It is not really a big deal, but it is bugging me. So, has anyone seen something similar? My iMac is a Retina 5K, 27-inch, Late 2015 model running macOS Sierra 10.12.

Wil Dieteren

iMac (Retina 5K, 27-inch, Late 2015), macOS Sierra (10.12)

Posted on Oct 20, 2016 10:29 PM

31 replies

Jacson-X

Level 1

4 points

Oct 30, 2016 6:43 PM in response to WilDieteren

Hi Wil Dieteren,

I have this problem too. Did you solved your problem now? I also want to know how to fix it.

WilDieteren Author

Level 1

24 points

Nov 1, 2016 12:47 AM in response to Jacson-X

@Jackson-X,

I have not solved the problem yet. But I also have not yet tried the suggestions of irina_w, have been to busy. I will probably try them soon, so you can wait until I have done so or alternatively try them yourself.

Wil Dieteren

WilDieteren Author

Level 1

24 points

Nov 12, 2016 11:54 PM in response to WilDieteren

@Jackson-X,

Taken a bit longer than I expected, but I think I found out what the problem is. I do not see the problem with a test user, and while the test user was shutting down I realized that it uses a stock Apple desktop background. I was using a non default, non stock Apple, desktop background, but have changed to a stock Apple desktop background which seems to have solved the problem for me. Still early days, as I have only just figured this out, but you might give also give this a try.

Wil Dieteren

Jacson-X

Level 1

4 points

Nov 13, 2016 1:28 AM in response to WilDieteren

@WilDieteren,

I was using stock Apple desktop background but I got the problem, after that i suspect look like the desktop background problem so i change to a non Apple stock desktop background on last week, after few days the problem come back again. This is what i have test.

Jacson-X

WilDieteren Author

Level 1

24 points

Nov 14, 2016 5:07 AM in response to Jacson-X

@Jacson-X,

You are right, and I was wrong. The problem reoccurred even with the stock Apple desktop background. This also shows that I do not always see the problem, although I see it most of the time, which makes it more difficult to tell if the problem has been solved. Do you always see the problem?

Wil Dieteren

Jacson-X

Level 1

4 points

Nov 14, 2016 7:54 PM in response to WilDieteren

@WilDieteren,

I don't know how to explain the problem, after upgrading to macOS Sierra, the problem is not offen, after long time use it, the problem quit always see it. But after i change the non stock Apple desktop background, the problem now less. Is so weird...

Jacson-X

Dec 16, 2016 8:13 AM in response to Jacson-X

Hi , i have just bought an iMac and I'm getting the same issue ! At first I thought it was something I had done , after googling it I found I'm not alone , it doesn't happen every time I shut down so it's difficult to monitor , somehow I managed to delete the operating system from my mac so had to take it in to have it reinstalled , the multi coloured screen was happening before I wiped everything and even after the reinstall I still get it , has anyone anymore ideas how to stop this happening ?

Dec 16, 2016 11:28 AM in response to WilDieteren

Hi All,

I have the same issue with my brand new iMac (5k 3,3Ghz, 2TB FD). I had the problem with the multi colored screen several times when shutting down or when closing Photoshop. I´m not sure if the problem already existed before I made the update to Sierra?

I´m not sure if that´s a hardware issue?

Kind regards

Dec 16, 2016 3:30 PM in response to Starwalker76

I have the same system and I've only had it a handful of times ! From what I've read iit seems to be a software issue this is the first mac ive owned so Im still yrying to get used to it

Dec 19, 2016 2:27 PM in response to WilDieteren

I have the same thing, but it doesn't happen every time I restart. It doesn't seem to be affecting the performance, but this iMac has been a little unstable in other little ways.

Dec 21, 2016 11:30 PM in response to WilDieteren

Hi Wil Dieteren,

I have this problem too. Did you solved your problem now? Please let me know to fix it.

thank

Dec 23, 2016 6:07 AM in response to WilDieteren

Yup! Not the only one 😉

I too have had this exact same problem on shutdown. I can't recall if it happened after the MacOS Sierra update or that it did it on OS X El Capitan too. It is indeed a very random error, which happens only once in a while. I have a 27-Inch 5K iMac from late 2015, so to me it seems quite obvious that is must be something specific to this model right?

I am quite worried, and I truly hope this is just a software-issue that will be fixed in the next update..

If someone manages to fix this problem, it would be awesome if they could share it with us.

Dec 31, 2016 1:48 AM in response to WilDieteren

I have the same issue and same iMac Late 2015 5K,1TB SSD with a M395X , noticed it yesterday, never had it with macOS Sierra 10.12.1 or El Capitan at all. Since the update to Sierra my iMac has shut down oddly like it stalls as with the background frozen for a second sometimes. Never did any of this with El Cap. Clean install of 10.12.2 didn't help.

nicklear

Level 1

4 points

Jan 6, 2017 7:12 AM in response to WilDieteren

me too - iMac 27" 2015, Sierra 10.12.2

Hopefully it's not a sign of a deeper problem

ifd66

Level 1

19 points

Mar 17, 2017 8:50 PM in response to WilDieteren

I have the same IMac model and the same problem.

multi colored screen when shutting down iMac