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golf1410

macrumors 6502a
Original poster
May 7, 2012
748
3
San Francisco, CA
EL CAPITAN 10.11.5

I am trying to nail down the root cause of the problem.

This is weird. There is white and black flashing on a small part of screen. It always happen on the left side of the screen toward to bottom corner of the screen. I can hop a mouse pointer over the area.
I am not sure it is the video cards problem, OS, cable or what?
I did capture the videos on my iPad. Please have a look.
Have anyone experienced the issue?



***Update 2***
I can scope down and be able to recreate the problem. It only happens when I open 2 applications. One application must be iTunes application. To recreate the problem, all I have to do is to expośe iTunes application with another application back and forward constantly.
I have changed the cable. But the problem is still exist.
 
Last edited:

keysofanxiety

macrumors G3
Nov 23, 2011
9,534
25,297
This is synonymous with failing graphics, so I'd guess GPU failing. If you have the D500 or D700 this is even more likely.
 

MacVidCards

Suspended
Nov 17, 2008
6,096
1,056
Hollywood, CA
I'd do it sooner than later.

Buying that 7970 on EBay is $1000.00 per used card.

Get Apple to fix it while you can. Don't wait for it to fail completely.
 

golf1410

macrumors 6502a
Original poster
May 7, 2012
748
3
San Francisco, CA
Hi guys,
Thank you for you help.
I can scope down and be able to recreate the problem. It only happens when I open 2 applications. One application must be iTunes application. To recreate the problem, all I have to do is to expośe iTunes application with another application back and forward constantly.
I have changed the cable. But the problem is still exist. I will try to run and test hardware as you guys suggest.
Any opinion?
 
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3568358

macrumors 6502
Jun 11, 2015
274
106
United States
What I think is happening is for some reason the computer is showing part of an application some how. Open activity monitor and check to see if anything says (not responding) under the CPU tab and RAM tab. If something is (not responding) select it, select the stop sign with an 'x' in it in the upper left, and select force quit. If everything is responding, quit all open apps. Then press Command + Option + Esc at the same time. Select Finder, Select Relaunch. Finder will re-calibrate basically. Let me know if it helps.
 

golf1410

macrumors 6502a
Original poster
May 7, 2012
748
3
San Francisco, CA
Guys, I decided to do 2 things.
1. I did clean reinstall OS. The problem was still there.

2. I went to Apple Authorization Service and changed both of my D700 cards.

However, the problem is still there. Now, I don't know what cause the issue. So, I ticked the reduce transparency setting in accessibility. The problem is gone.

Weird
 
Last edited:

kucharsk

macrumors regular
May 31, 2016
150
92
Why are you so hesitant to take it in?

If you have a failing card and reduce the load on it, that's not going to help things any.
 
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koyoot

macrumors 603
Jun 5, 2012
5,751
1,771
It most likely is software problem, not hardware. Especially if this is been able to be completely eradicated with changing the settings.
 

golf1410

macrumors 6502a
Original poster
May 7, 2012
748
3
San Francisco, CA
Why are you so hesitant to take it in?

If you have a failing card and reduce the load on it, that's not going to help things any.
Thank you for your reply. I did take it in. Both D700 cards were changed. But the problem is still there. I was so sure that the GPUs were the cause. Now, I have no idea what the root cause is. Totally blank atm. Could it be logic board? Software bug?
They ran a bunch of testing. Nothing wrong at all.
 

koyoot

macrumors 603
Jun 5, 2012
5,751
1,771
Display signal comes from GPUs to display by Thunderbolt. Similar problems can occur not only on Mac Pro 2013, but also Macbook Pro even with integrated GPUs. The hanging of the drivers on MP AND MBP(at least mine previous MBP mid 2012 which started with... OSX 10.10 update) has the same cause. And it looks like it is not exactly the GPUs. It has more to do with MB/Thunderbolt/Software. People who do not have latest two versions of OS X, but are still on Mavericks are not experiencing driver hangs.

So it is more software related issue. The GPU recall that Apple issued on the other hand is affected by hardware faults.
 
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