OS X Yosemite Keeps Crashing To Log-In Screen

Nop, neither external monitor nor Flash Player. But probably an intense use of the graphics card (like an external monitor or a video viewing in a Flash player).

Uwe

The NVRAM reset and display profile reset tricks that I reported earlier solved it almost for 10.10.1 but I did experience one crash still. After upgrading to 10.10.2 I haven't got a single crash, so it definitely solved the problem for me.

yeah, maybe.

I'll try to force using only dedicated graphic card for a while and let's see...

My 2 external monitor are HDMI (one in the office, other at home)

I'm still experiencing the problem as well. Less frequently than with 10.1.1, but I just had it happen for the second time. So 10.2.2 appears to be an improvement, but not a solution, for me.

just to update my particular status with this problem...

after the earlier discussion about custom color profiles, I changed my iMac back to the default color profile, but then still experienced a couple crashes to the login window within a few days. Although others have evidence pointing to graphics related, at least in my case I'm not entirely convinced since I have no external monitor and am never doing anything graphic intensive at the time of these crashes - usually the computer is just sitting there with an idle screen - perhaps Safari loaded but no windows open, or even juat at the login window itself. No screensaver set, either.

on Jan 27th, I updated to 10.10.2, and now about 2 weeks later I still have not had a reoccurrence of the problem.

as the problem was intermittent anyhow and seemed to happen at random times, I can't say with 100% confidence that the update solved it for sure... but normally I would have the problem at least every couple days, but so far, so good after 10.10.2 update. keeping my fingers crossed...

Still experiencing these crash issues with 10.10.2. Very frequently and they don't appear to be related to graphics. Hoping for a fix soon...Apple???

For me the problem is definitely solved now!!!

I had tried all the many recommendations and tested many of the reasons suggested by me and others. Nothing worked and none of the supposed causalities actually applied. Then, with my skyrocketing frustration levels, I went to the AppStore, loaded and installed 10.10.2 (no clean install) over the existing 10.10.2 update and, Bingo, no more crashes to login screen for one week by now. I gave the MacBook Air really hard times and connected /disconnected all sorts of external monitors, screen savers, bluetooth mouse, different WLANs (even in flight internet on a Lufthansa plane), 50 large pdf at the desktop, and opened in Preview, etc. - it patiently tolerated all this and is running crash free. If it goes on like this for another week, I will open a bottle of champagne and drink it with my wife, if not, I pour it into the keyboard.

I am having the same problem. Never had a problem with Mavericks. I have a MacBook Pro (Retina, 15-inch, Early 2013), 2.7 GHz Intel Core i7, 16 GB 1600 MHz DDR3, 500GB SSD, Intel HD Graphics 4000 1024 MB, OSX Yosemite 10.10.2.

Hope there is a fix for this soon!

This forum has been going on now, for quite some time. I have read through many of the issues, complaints, and suggested fixes, but still cannot come to any solid conclusion of what is causing the reset to login screens issue. I too, wiped my disk, loaded Mavericks, upgraded to Yosemite and then to 10.10.2. This fixed my problem. Have been running without interruption now for several weeks. There is no question in my mind, that is was Yosemite that created the problem in the beginning, and it is something in the install process that either fails, or changes on each iterative, installation. I would really like for Apple to admit to this problem and tell us the root cause, and/or what in the final release of 10.10.2 fixed it. It's not right that they keep us so frustrated and that we deserve to know it was not anything we were doing, so we can finally put this issue to rest.

BTW, there is still something wrong with WiFi (or maybe Safari) as I often have it hang or just stop working way too often. This is not new technology, and it is mature enough now, that no browser or WiFi connection should ever just stop working. As an Apple user it is embarrassing that our Safari browser is not the fastest, most advanced, and most reliable browser made today. As much technical savvy, time and money Apple has invested, it should be.

There is one underlying action that seems to be somewhat common, that might solve the riddle. Re-installing the latest update (10.10.2) over itself? How many times, I don't know, but it did work for me and a couple of others on this forum. I have a MacBook Pro and an iMac that I did an install of the "final" update of 10.10.2 at least twice on each machine. I'm just guessing here, like we all have done, but it would help explain some of the behavior. I can imagine the install process of any updated OS to be a very complicated process with lots of forks. That is why it is very important that you have a clean and stable system, and a clean reboot prior to any new release, patch, or OS upgrade. I try to remember to do a Disk Utility fix and a reboot before installing any new software, but sometimes get in a hurry or just plain forget.

I hate to toss out yet another trial and error idea, but it won't hurt if it's already broken.

This Crashing To Log-In Screen issue has been driving me nuts for quite a while now. In the past week or so it's been doing it quite a bit. As with Prof Dr Burghardt Wittig, I went to the AppStore today, downloaded and installed 10.10.2 (not a clean install) over the existing 10.10.2 update. I am not married, but similar to him, if it works without kicking me out to the log-in screen for another week, I will open a bottle of Cognac and drink it with a smile, if not, I will pour it into my keyboard!

🙂

Funny, how things are... :-(

I did the same some days ago: went to the App-store, downloaded 10.10 and installed it (no clean installation). Result: same sh**, different day.

Yesterday I made a CLEAN installation. Result: same sh**, different day...

What happened:

• Yosemite is much faster after a clean installation
• I installed Firefox, Chrome and made some configurations
• I tried to install Adobe Creative Suit CS6 and while installing my MBP crashed back to login.

So what's the choice? Waiting for Apple to get it done? Well, they didn't manage to do it within the last month. Going to buy an MS-based notebook? Don't like the idea. Bad situation. :-(

PS: my keyboard's already gone... ;-)

Hi, I've been "crash free" for more than a week, then crashes happen again and often, I tried the multi Combo update installs, but no luck with taht, 3 updates and still crashing...

Furthermore, I was working on a colleague's computer and I got the same crash!! so I talk with him and because he comes from Windows, he tought that was also normal at Macs!!! amazing… but I couldn't say anything...

this is so incredible!!

Just a quick update on my similar situation in case it helps someone on this thread. After the upgrade to 10.10.2 my crashes to login screen went away but I started having machine freezes that seemed also related to graphics. This became worse and worse to the point that the machine would not even boot and yesterday I finally had to declare it dead.

Faced with $1k and more for potential fixes that would leave me at best with an old laptop, I decided to go for broke and try a home reflux. Took the logic board out, put it in the oven at 200 ºC for 7 minutes, reassembled and now the machine works like new. No crashes of any kind, all functionality restored. Of course I took a tremendous risk in doing this, out of desperation, but I got lucky.

COINCIDENTALLY, today Apple made an announcement that I would have made my day if I had known about it yesterday, and which may help someone else: http://www.apple.com/support/macbookpro-videoissues/

Good luck.