Blinking pixels on screen after Yosemite install

I did it twice. Even I put the link to this thread too.

Well, and well again..............
I talked to the tech again this am, and he told me to go to the closest apple repair and use the CS code he gave me for repair. TRhey will dianose the graphics card, the Internal Optical Drive, and wipe and install the latest Yosemite: NOTE At the Apple repair shop, I was informed that Yosemite a=today released a "hot fix"! WONDERFUL! Had I known they were going to fix this issue 1/2 hour after I left for the shop, well, duh! BUT, in the end I might as well take advantage of the graphics card and drive repair/replace deal while the thirty days warranty extension is ticking!NOW, what I'm curious about is, has anyone tried the new 10.10.1 fix? And if so, is everything fixed?

F

I'm sittin here with this deltone name, and have yet to receive even 1 'this helped'
BUT, if it didn't help, fahwghetaboutit!

I don't see any update available for Yosemite neither for my 27" mid 2011 iMac not for my 13" mid 2014 MacBook Pro Retina. It maybe available later today??

Theres currently no 10.10.1 update via Software Updates on my 2012 MBA either.

Although it's interesting that enricoclaudio above saw this on the Adobe forums. I have no Adobe software on my MacBook Air, but if this is related to a bug in an updated kernel extension, users may see this more when they increase usage on their GPU.

Deltone as a tech I would recommend you err on the side of caution for 'taking advantage' of a free repair. If you truly believe the repair is not needed, getting one anyway and pulling apart a machine and putting it back together can introduce issues could increase your downtime. Totally your call since repairs may give you further repair coverage in the future depending on part warranties and local consumer laws.

...and hey, Pink Panther - deltone was only repeating what i'd posted anyway 😉

Did it. Now let's hope they react.

I too am experiencing the same problem.

I have an: iMac (27-inch, Mid 2011) with a AMD Radeon HD 6770M 512 MB

During the Yosemite update my installation "Timed Out"... I nearly had a heart attack... after patiently waiting for a few hours I finally decided to try a "Hard Restart" (holding the power button until the system shut down, waiting for a few minutes, then powering the system back on).

Upon restart, the software completed the install and I was immediately greeting with a warning message: "if you want to use CS4ServiceManager Legacy, you'll need to install an update...". I assume CS4 refers to an old version of Adobe software, so I did the update and the pixels problem seem to go away.... for a little bit...

2 days later, the pixel issue began again...

it's been on and off...

I thought it might be a "Chrome" issue as the pixel issue typically happened when I have Chrome open.

Therefore, I shut my computer down, restart, and the pixel issue goes away for a while...

Today the pixel problem began while I was working in Adobe Illustrator...

APPLE ... PLEASE HELP !!!

I would suggest to post your problem at Adove forum as well. They are aware of this and they are working with Apple to find a fix for this issue. The most we post the sooner Apple will take care of this.

http://feedback.photoshop.com/photoshop_family/topics/photoshop-cc-on-yosemite-g raphics-problem?utm_source=notification&utm_medium=email&utm_campaign=new_commen t&utm_content=topic_link

thanks, but your opinion is one among many. I trust the engineer in Canada, and he suggests that it is feasible that a software problem CAN and infrequently DOES effect the performance of a graphics card. AND, since my optical drive refused to even recognize or load the Apple OS X install disks, there is obviously a problem with the optical drive. Yesterday the unit was on the bench getting diagnostics run. I will find out today (?) what the REAL outcome is. My bet is that there is a software problem with the Yosemite install. AND, it may or may not be associated with Adobe or any combination of conflicting apps. But in my case, I see a coming together of what could be graphics, program conflicts, and, obviously the optical drive. So, I'll choose the path to follow, in this case, listening to the Apple senior tech, and letting the diagnostics run the play. And as far as contacting apple.com/feedback, there are a lot of folks on this thread and others that have suggested it as a necessary option. LOTS of folks.

Good luck with your machine.

The techs suggestions align with the conclusions in this thread which is reassuring.

From the sounds of it you do need your ODD replaced, but I agree - software seems to be the root cause of the graphics issue.

Please let us know what resolution you were given as it may help us triage this issue further. If a GPU replacement is needed, we'd be keen to know if your issue returned.

As for my machine, I've only seen the issue once, and no third party software was installed at that time indicating with all else previously noted, this is a Yosemite issue, not hardware. I'm awaiting a software update, but being difficult to reproduce consistently, the finite solution may be a way away.

I've had this same problem as well, only in terms of severity, it includes huge patches of my screen rendering as random, geometric anomalies, accompanying the wall to wall pixel artifacts we're all seeing, forcing constant restarts or outright crashing, taking my work with it. I'm sensing quite a bit of frustration on the issue from visitors to the post, and though there doesn't seem to be any clear remedies coming from Apple (other than the "GPU Replacement Program for mid 2011, 27 inch iMac Models", for which my 2011 27" serial number mysteriously doesn't appear to qualify), maybe a better understanding of what's actually going on here will at least put the situation in a better understood perspective.

Everyone here, as in many, many other cases of tolerating a product of compromised quality, is a victim of the modern day business paradigm that has taken the customer from its traditional position of being the most important element in the marketing equation to being the least important. In other words: You are the customer, and You don't matter. You #1 position has been taken over by the stockholder. How could this be? Because a company like Apple has hundreds of millions of customers, many of whom will tolerate anything just to have the Apple logo on their desktop or in the pocket, and this allows Apple to be as concerned with your issue as an elephant might be toward a dust mite. You, we, don't matter. So if a solution is going to be found, it will be among those unfortunate victims of this modern day equation who discover and circulate it, because my interpretation of Apple's disregard for this matter is:

You are the customer and You don't matter.

(BTW: This isn't a Yosemite issue. Mine is happening on Mountain Lion)

Like I mentioned before in another thread my iMac has been free of display issues for the last 48H after turning OFF transparency. In my case transparency is the trigger. As soon I turn transparency ON the display issue comes back.

I've had transparency off almost the whole time I've had Yosemite installed, although I can't recall is the issue occurred before or after I had transparency turned off. Nice catch, I wonder if others can reproduce this?

Hi,

Took my iMac mid 2011 into an Apple store and it was replaced with a new "late 2013" 21.5 inch Processor 2.7 GHz Intel Core i5 8GB 1600 MHz DDR3.

The mid 2011 iMac was non-re-repairable.

After initial research (which finally led me to make an appointment via Apple Support for the 'genius bar', I found that the graphics board was failing which is mounted on another card (forgot which card).

Via 'Macworld' UK I found a statement (date not on printout) that "Apple has begun a graphics card replacement program for select mid-2011 iMac configurations, after determining that the graphics cards in some 2011 iMacs may fail. ......Apple says that some AMD Radeon HD 6970M video card used in 27in iMacs with 3.1 GHz quad-core Intel i7 processors may fail.

The graphics card failure in these models can cause "the computer's display to appear distorted, white or blue with vertical lines, or to turn back," Apple says."

At the Apple 'Genius Station' a deeper test was run then I had seen previously and it supported the fact of 'graphics card' failure. In upgrading to Yosemite just to see what would happen, I had numerous warnings upon a restart that "A graphics problem has been detected" and I did click report and sent each incident to Apple.

My suggestion....get an appointment at 'genius' or where ever you get service.

Great service by Apple after I chose to take the iMac mid 2011 into the Apple store for my appointment. I was called 6 days after taking it in and was informed of the internal issues and that I would receive a new Mac. Fantastic. iMac was covered by the 'warranty' I was told, 100%.