MacBook Pro (Retina, Mid 2012) freeze with Yosemite

What are you guys talking about? Bending the case? Backlight going off? Please go to another thread. It has nothing to do with GPU switching problem.

I thought as you during a long period of time. But crazy problems need a global view.

I thought my mbpr was ok for the dustbin and now it's brand new except for external screen.

Highly embedded electronics with advanced power functions can have unpredictable behaviour for guys like you and me.

What I mean is that the corrosion of one track of one thunderbolt port can ground something that shouldn't be grounded and that the activation of the dedicated card can obviously cause unpredictable software behaviour.

I also say that the mid-2012 models are prone to be corosionned these times of Yosemite (such as mine).

What 90% of people of this thread are experiencing is just the beginning at my eyes (symptoms took 2-3 months before I considered my machine as insane for my work, and it began with the same symptoms as this thread !).

I now have an almost full functional again mid-2012 retina and want to share this experience, even if you think it's out of topic

nrj45

Please read carefully the thread. We talk about another problem. It applies not only mid 2012 MBP. For example i have late 2013 with the same problem.

The symptoms are clear: Freezing when switching between cards, with working mouse pointer. That's all. No problems with external display, no problem with apple light, no another crashes. And problem can be solved by switching off "Automatic graphic switching" in Energy Saver settings. But we wait for normal solution by apple, cause this bug appears in Yosemite.

No problem. I just encountered the very same symptoms during a while (at least for one month I used gfxcardstatus to force embedded graphics, also under yosemite to avoid crashs).

Plus :

• I posted my answer in a separate thread for those who may have interest in it
• my post was answering to KennySimoen who was saying : "Sometimes it takes me more than A DAY before I get to my homescreen again...." which is the very same symptom as mine

I think that I and KennySimoen are not alone to experience this further symptom in this thread.

I even think that not all users are affected by your symptom (eg. only a portion of mbpr 15 mid-2012 yosemite users experience this symptom)

I even even think that the corrosion could be the major cause of the present discussion

I mean corroded MBPR could be the cause of all these graphic glitches (with owners complaining in this thread, praying Apple to give a software solution to a hardware problem)

I know it seems strange, but I had some reasons to post here

GPU switching problem occurs for brand new logic boards too. And it is not limited to Mid 2012 MBPR.

I'm still kind of shocked by your post. I always touch my MBPR really carefully while you are talking about BENDING the case. If you bend the case, of course you will have corrosions or whatever it is that you have.

There seems to be multiple issues, and I seem to have a slightly different one from most.

When my rMBP mid 2012 locks up, so does the pointer.

Just installed the latest Yosemite update (10.10.2). Even though nothing in the release log mentions graphic fixes, the black corners around the volume change popup are gone in reduced transparency mode. This suggests they definitely did some changes in the graphics department. I've disabled gfxCardStatus and have turn reduced transparency off. Crossing fingers.

I have found a solution!

A DOWNGRADE TO MAVERICKS 😀

My computer stopped crashing, glitching etc. right after the clean install of Mavericks.

Now I will wait a while before I re-install Yosemite...

For me the update did nothing in the department of crashing

For me everything is still running right as rain. Response to input is finally back to what I expect from my MBP and it's been an hour.

Anyhow, Ill know for sure after it ran a couple days, Mavericks ran for weeks without a glitch.

Blizzke wrote:

Just installed the latest Yosemite update (10.10.2). Even though nothing in the release log mentions graphic fixes, the black corners around the volume change popup are gone in reduced transparency mode. This suggests they definitely did some changes in the graphics department.

A re-designed graphic asset has absolutely nothing to do with the graphics drivers. But hopefully Apple did do something with those as well. I've turned graphics switching back on to see whether my Mac still locks up.

KennySimoen wrote:

I have found a solution!

A DOWNGRADE TO MAVERICKS

This is not a solution, but a workaround.

A re-designed graphic asset has absolutely nothing to do with the graphics drivers. But hopefully Apple did do something with those as well. I've turned graphics switching back on to see whether my Mac still locks up.

Please don't threat me as if I'm stupid. There was a transparency issue (black corners) when rendering the popup with "reduced transparency" on. The fact that the black corners aren't there with the option turned off suggests to me that this isn't a problem with the graphic itself. It has a correct alpha layer or whatever they use to determine transparency when rendering or it would be there always. So it probably was a bug.

This being fixed leads me to conclude they at least touched some of the graphic code.

Just saying.

Right, I didn't realise that. Sorry.

Just did the update for 10.10.2. Worryingly all I got on restart was a black screen! So, after trying various things I pressed the power button down for ten seconds until I heard the machine switch off. The power button again to restart.

Still a black screen.

Then I realised that it was the login screen (it wouldn't cmd-tab) so I put in my password and I could tell (again cmd-tab) that it had booted up. Still a black screen.

Closed the lid, ten seconds later opened it up again. Still a black screen.

Getting rather p'd off with Apple / Yosemite. Windows 8 would be an improvement at this point. It's a $3,000 paperweight.

Thinking this is a visit to the Genus bar and let off both barrels at Apple (they deserve no less for Yosemite and the problems it's caused) decided to try one last time.

Closed the lid and waited a minute before re-openning it. Finally something worked! I could tell the graphics of some windows were screwed up as it hastily cleared them.

I'm now frightened to close the lid again.

I feel your pain, I had some heart palpitations myself during the process 🙂

For people reading this: The update restarts the system multiple times and takes quite a while!

2 times a full reboot. After that it displays a grey screen and does a final update round of about 9 more minutes.

For me the screen remained fully black after the second reboot for a minute or two, but I just let it be.

Note: If you have an external display connected and your macbook screen remains black (and the external monitor just has a background color): Disconnect the external monitor, your main display will show the progress bar then. Think this is some issue.

So in conclusion, it takes a while, be patient and try not to stress too hard 😉