OS X Yosemite Keeps Crashing To Log-In Screen

Same here, 1 account only and I am not using TM. By the way, the last crash happened a week ago. I don't do anything different, I use the same apps etc., so I don't know why I haven't been having crashes latey.

I'm not using Trend Micro. It only happens to me when my computer's idol for about 10 minutes; hasn't happened while I'm actively using it.

It's amazing Apple hasn't patched it yet. There should be 200 developers working 24/7 on holiday pay to fix this bug – it's completely unacceptable for all these computers to be broken due to an Apple-sanctioned update.

Every time without fail I switch on,log in and after about ten to fifteen seconds it crashes back to log in screen....

Not using TM here and while I have 2 users, I only use one of them. I also don't see any log errors related to files or directories. It would be nice to figure out if there's a commonality. Do you have an SSD?

I haven't had a chance to rebuild yet, been out of the office.

Yes I'm on SSD – It's a pre-retina MBP, replaced the DVD drive w/a SSD, so it's not an Apple original drive. I know at least one other user did the same, but it's happened on Apple original drives, too. Don't know if any of them were *not* SSD, so it might be something worth pursuing.

Experiencing the same problem. Almost certain its a load issue. I have a MacBook Pro 13" late 2010 model. No omni or xfinder. I don't switch between accounts or anything tricky like that. It tends to crash to the login screen when I've been working Safari pretty hard with lots of tabs and streaming video. I'll wait till the next patch bump, but if that doesn't do it I'll try a full reinstall.

I'm going to take back what I said about Yosemite. After reading a lot of these posts, and after hours of identifying and removing what I suspected might have been software/apps causing the problem, it seems there are multiple, yet different, issues that may look like the same. From my side, I was experiencing reboots, perhaps 2-3 times a day, almost entirely happening when I was not at my iMac. And it happened once when I was using my MacBook Pro. These were random, but had started happening right after I had installed two apps, (which have since have removed).

It's been a couple of days now, and I have not had any reboots on my iMac. One of the suspicious apps was "Location Helper" which little is known about and there is no documentation, but it is an App Store app, so I hesitate to blame this one now. The other app was GEDitCOM, a genealogy app, which I also removed. I'm not 100% sure this was the problem.

Bottom line is I am not blaming either one of these as I cannot prove they were causing my reboot. However, if there is anyone else out there that installed either app, and is having similar issues, I would really like to hear from you, then we may be able to sleep at night knowing this fixed a reboot problem.

I don't even know what these apps are, I never had them on my Mac Mini.

I really doubt it has anything to do with 3rd party apps. Even if it does, as I said before, an operating system should be robust enough to isolate problem applications without imploding. A stable operating system should just not spontaneously crash, reboot, or log off. PERIOD. Unix based operating systems have always been rock solid and stable. What the heck is this?! I hope Apple software engineers are making this bug a priority to fix. I'd hate to think I'd have to switch back to MS Windows for stability!

. . . and mine just crashed back to the login screen again.

All I was doing was reading email with Mac Mail.

This is a joke.

😟

No fix yet, but here's something that might relieve some frustration until there is one. Open a tab in your browser to Facebook (other sites will work but Facebook is where I discovered it). Enter some text into the "write post" text input, but don't submit it. Leave it there, and just leave that tab open in the background. If you try to close the tab/window/browser, Facebook prompts you first because for all it knows you just wrote your doctorate thesis in a post but forgot to submit it. So when the logout process gets to the browser, it will be blocked, waiting for an answer to the prompt. When that happens, click cancel (or "stay on this page" or whatever) and you can keep working. The OS may have already shut down some processes or other apps by this point, but at least it stops the logout process from completing and maybe you can keep working.

It just logged out again! 😠

I'll try the Facebook thing, but if that doesn't work I am going to boot up Windows 7 and work there until they fix it.

I sit down at my iMac first thing this morning, and it was at the login screen. It had rebooted some time in the night. Nobody using it, and it wasn't running any applications. The only explanation is that it was running some kind of background process that panic'd. However, no matter what that process was doing, it should not have caused the OS to reboot. There has to be something in the OS itself that is malfunctioning. I have never, repeat NEVER had this problem from any previous OS, no matter what applications were installed, and no matter what background processes were running. Like you said, this is unix - not Windows.

Facebook? I doubt that would help anyone. This issue is "real".