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KENTW

macrumors member
Original poster
Mar 4, 2009
66
1
Hi all,

I have searched for a similar issue but cannot find anything that matched so apologies if its just because I suck and can't find it.

I only noticed this since installing the Safari 13 update, however, it may have been a problem before and I have just not noticed it.

I have a late 2015 5K iMac, periodically when in full screen mode in safari and I hit the Tab Overview button, my graphics card goes berserk and I have to restart my Mac to get back to normality.

I don't have any other graphics related issues and I have tried the usual clearing cache (normal method and via the developer menu) as well as deleting all web site data.

Just wondering if anyone else is having this issue? It doesn't happen every time I use the Tab Overview button but its on average 1 in 15 times.

Thanks,
ST
 

redheeler

macrumors G3
Oct 17, 2014
8,423
8,845
Colorado, USA
This has happened to me before on older versions of Safari. Recommend reporting it to Apple. Surprised the issue (which is serious enough to interrupt what you’re doing and require a restart) still isn’t fixed, but it does seem to be specific to the Late 2015 iMac.
 

KENTW

macrumors member
Original poster
Mar 4, 2009
66
1
Thanks for the input. Just odd that it freaks out the graphics card so much. I thought the GPU was fried at first. I will report to Apple. Many thanks.
 

KENTW

macrumors member
Original poster
Mar 4, 2009
66
1
Just as an update incase anyone is interested..... I reported this issue to Apple - tech support on chat for about 1.5 hours having me change this and that.... ended up re-installing the operating system. Still crashes!!!! The search continues.
 

kretek

macrumors regular
Oct 15, 2008
110
11
If you referring to the same behavior in the attached clip.

Had this issue on my late 2015 27" iMac when clicking tab view in Safari 12.

It's a hardware fault, needing a replacement screen and logic board.


 

KENTW

macrumors member
Original poster
Mar 4, 2009
66
1
Yeah very similar to what your video depicts...... did you need to get the logic board replaced? Did it fix the issue? Its just odd, as in safe mode, whilst on the phone with the tech, we could not get it to crash at all.
 

_Kiki_

macrumors 6502a
Aug 13, 2017
961
281
iMac 5K 27 Late 2015, MacOS High Sierra 10.13.6 , Safari 13.0.1 and tab overview working flawlessly, so looks like you have a hardware problem, in safe mode metal is switched off, so no hardware acceleration
 

KENTW

macrumors member
Original poster
Mar 4, 2009
66
1
Ok, thanks for the reply's guys. Will continue down the avenue of tech support.... will let you know the outcome in case anyone has interest.
 

kretek

macrumors regular
Oct 15, 2008
110
11
Yeah very similar to what your video depicts...... did you need to get the logic board replaced? Did it fix the issue? Its just odd, as in safe mode, whilst on the phone with the tech, we could not get it to crash at all.

Yes the logic board was replaced. Unfortunately the problem came back 3 months later, but this time the problem occurred whilst doing photo editing. Again, logic board and screen replaced.

The Apple service provider I used, could only replicate the issue after subjecting the iMac continuously to heavy diagnostics tests and the issue only came up after 72 hours.
 

KENTW

macrumors member
Original poster
Mar 4, 2009
66
1
Incase anyone has interest, I did more research on this issue..... I found a forum discussion on the Apple Support site where a bunch of people had the same issue.... they were convinced it was a corrupt driver issue. I am not saying the above regards the logic board is not valid, just relaying what I have found. Also, and probably more interesting.... I have just installed Catalina and so far the issue is not occurring (touch wood). The animation is not as smooth as I would like, but it ain't crashing so far.
 
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