Progress Bar Stuck on 100% on boot High Sierra

I have a Mac Mini (Late 2012).


Last month I upgraded the memory from 4GB to 16GB and installed macOS High Sierra; am currently on version 10.13.1


Yesterday (11th November 2017) I booted up my MAC at 9 am (ish) with no problems, during which time it successfully backed up twice to Time Machine at 9:15 and 9:50.


I shut down not long after this, then booted up again at about 13:10, and noticed the usual progress bar beneath the apple symbol was taking a particularly long time. I did a hard shut down and restarted, and still it took a long time, so I left it, then after about 20 (far longer than usual) minutes, it reaches 100% and stayed there: no log in screen.


I shut down and tried to reboot in Safe Mode (holding shift after the chime) but this made no difference as I never got to the log in screen.


I reset PRAM/NVRAM by rebooting and holding command+option+P+R at the chime. Nothing.


Reset SMC (unplugged, held power button, released, plugged back in) still no log in screen after 100%


I booted into recovery mode, opened Disk Utility and checked my hard disk. It returned ok with no errors found. Rebooted, still stuck at 100% with no log in screen.


This is where it starts to get scary.


I rebooted back into recovery mode, and reinstalled High Sierra (took about 3 hours), and, incredibly, it DIDN'T FIX THE PROBLEM!!(still can't believe this!!!) After installing, it rebooted, and again after half an hour the progress bar reached 100% and stayed there: no log in screen! How can actually reinstalling the entire operating system NOT FIX a start up problem? Does it not overwrite the system files it needs to reboot? I just don't understand how this is possible!?


I then went to bed and left my MAC on overnight. In the morning (about 7 hours later) still apple symbol with progress bar at 100%; no log in screen.


I booted in Verbose mode (command V) and saw lots of crashed processes "producing too many corpses"


I decided at this point to restore from a time machine back up. I didn't chose the ones from the morning before because it was after these back ups that my mac wouldn't restart, so opted for the back up the night before because I successfully restarted after this the following morning.


It took 8 and a half hours.


When it had finished, my MAC started just like it had before the problem occurred and everything was back the way it was before anything had happened.


The point is: I am now absolutely terrified to shut my mac down. I did nothing - install any new software, download anything etc - between booting up yesterday morning and yesterday afternoon which would have caused such a critical error, and I just can't believe that I couldn't boot into safe mode, and reinstalling High Sierra didn't fix it (still can't get over this), and am not going to be able to shut down until I know what caused it because I can't wait 8 and a half hours every time I need to use my MAC!!!


I read some articles about kext files, and booted in Verbose mode and saw some error messages about crashes and "too many corpses". I've also in Terminal compared the current system library with the one from the last back up that I successfully booted from and it's only found very few differences - mainly mobile assist fonts, and only 8 cash files - which is really surprising; are the files needed to start up kept somewhere else other than System/Library? I also read that other people managed to log into their macs after restoring from a back up like I have but after the next restart the problem still occured and they couldn't get back in.


Could all this have been caused because I interrupted it when it was being slow to start the first time? But why would it suddenly take so long to start when I haven't installed anything new, and there hasn't been any updates?


Would it be safe to wait for the next update and shut down then?


Is there any danger in leaving your mac mini on for a long time? (fan, heat etc)


Obviously the longer I leave it, the more data I will lose as I will have to restore from the last back up before the problem occurred which is currently the 10th of November, if it won't start again.


Anyone had the same problem and found a fix? Is it now safe to restart? I head something about Kext files in the Extensions folder and moved them but it didn't fix my problem. I can't think of anything I did between 9am and 1pm that would cause such a slow start up followed but such a fatal error; I installed High Sierra over a month ago, and installed the last update over a week ago.


What could High Sierra have done on it's own in the background between 9am and 1pm that now prevents it from starting up?


HELP!

Mac mini, macOS High Sierra (10.13.1)

Posted on Nov 12, 2017 1:12 PM

Reply
Question marked as Top-ranking reply

Posted on Apr 28, 2018 1:42 PM

I'm a very experienced Mac tech support consultant, yet I've been grappling with the "too many corpses" problem since yesterday. I tried a number of approaches, but was confident that a simple solution existed. YOU MAY NOT HAVE TO ERASE YOUR HARD DRIVE, or reinstall Mac OS. I found a couple of postings that explain this surprisingly quick solution. If you're able to get into Recovery Mode utilizing CMD-R, and you're not afraid to work in the Terminal program, THIS WORKS! If you follow these steps EXACTLY, a bad file named "mbr_cache" will be rebuilt and your Mac will reboot successfully (slowly the first time as the rebuild happens, then normal speed after that). This solution worked on my 2011-vintage 21-inch iMac (iMac 12,1) with Mac OS High Sierra. Someone should tell the Apple Geniuses and Tech Support Specialists about this. Or, better yet, they should be able to find these types of solutions themselves. Good luck!

The two articles where I found this solution are:

macos - Opendirectoryd too many corpses being created - Ask Different

https://mrsystems.co.uk/blogs/news/too-many-corpses-being-created


Steps from the articles:

  1. Boot and hold CMD-R to start up from macOS Recovery
  2. If Filevault is on, mount the disk with Disk Utility and enter password
  3. Enter these two commands in Terminal
  4. cd /Volumes/Macintosh\ HD/var/db/caches/opendirectory
  5. mv ./mbr_cache ./mbr_cache-old
  6. Exit from Terminal
  7. Restart the computer
148 replies

Jan 11, 2018 1:39 PM in response to MSPhop

Both external SSD drives with clean-installed High Sierra (MacOS 10.13.2; installed with USB installer which was created on Jan 10, 2018) boot fine as external drives in my MBP13 (early 2011). But it seems to take forever to shutdown.


After one of this bootable SSD drives was input as an internal drive, the progress bar stuck on 100% on booting, and login window never shows. With the external-drive booted, run First Aid at Disk Utility for the internal volume, resulting to be OK, and as mounted when exit the Disk Utility. But, the internal disk does not show at Startup Disk of System Preferences.


What could be wrong? Any suggestions or clues will be appreciated

Jan 14, 2018 9:36 AM in response to fpuk69

This post now has more than 8K views. Another post about slow booting in High Sierra has more than 15K. Do we seriously have no guidance yet from Apple on this problem?


For me this has been an intermittent problem for perhaps two months. I am about ready to throw my 2012 Mini through a window if it doesn't stop sticking on the boot progress bar (sometimes at 100%, other times less). I have to force shutdown because of this several times a week. Usually, on the second try it succeeds. In a variation of this glitch, I will notice the mouse pointer flickering in the upper left corner of the black screen, telling me the boot actually is done. I move the mouse and voilà, the login screen appears.


Yes, I have booted into recovery mode and run first aid a number of times. Never seems to find anything wrong.


P.S. another stellar example of why I *will not* give up my Power Mac G5 (dual core 2.0), on which this post was written and sent.

Jan 18, 2018 2:29 PM in response to steve626

I can't believe that Apple isn't addressing this issue properly.


I recently had problems with my Macbook Pro running slowly so Apple Support told me to update my OS to Sierra. It worked for a short while then went slow. I contacted Apple Support for some advice and we ran through a few steps. It didn't seem to make a difference. Then I went to start up one day and it wouldn't start. Same situation as others here. Progress bar taking ages to progress to 100% and then nothing further happening, even when left overnight.


My major issue is that I had just downloaded pictures of my newborn son, and had not had a chance to back them up, so I absolutely don't want to lose the data.


After numerous dialogues on Apple chat. I have:

  • Run Disk Utility in Recovery Mode - nothing found
  • Tried to boot in safe mode (it won't - producing too many corpses)
  • Checked the file system
  • Reset the NVRAM
  • Reset the SMC
  • Used Target Disk Mode (HD not detected)
  • Reinstalled macOS Sierra from Disk Utility


NONE of these steps have worked!!!


I find it hard to believe that the laptop can just stop working like this and Apple can't offer a solution. It's not what you expect from simply using the product as advised.


If anyone has any helpful advice or managed to get it to work please let me know!


Thanks

Jan 18, 2018 3:58 PM in response to fpuk69

Been on Apple Support again.


They took me through an attempt to reinstall OS using Internet Recovery. As the OS available on Internet Recovery was Lion, it wouldn't do it as a newer OS was installed. Good job it didn't work too, as I have now learnt that despite the advisor confirming to me three times that there would be no data loss, it actually would have completely wiped all data.


Apple needs to get a grip on this - it's absolutely no way to treat customers.

Jan 26, 2018 9:15 AM in response to Ashley Eldridge

My MBP situation seems more complicated. The computer was upgraded to High Sierra in early December 2017, and worked well for a few weeks before freeze. Now, clean install of High Sierra can be done smoothly for external SSD drive, but can not internally for the same drive. After the externally installed drive is swapped inside, it can not boot or get dead pinwheel for any movement if luckily booted. It seems the drive cable could be a problem. Then I replaced the old cable with a new one, and can not get any improvement. When a SSD with Mac OS X Lion (10.7.5) is input as interval drive, the computer behaves normally - as fast as before crash, which indicates the drive cable should be fine. I also tried to reversely format the drive to HFS+ and clean install Sierra. The Sierra installation internally took overnight, and the result is the same as High Sierra - can not boot. The computer is MacBook Pro 13 (early 2011; A1278) with the following features:

Hardware Overview:

Model Name: MacBook Pro

Model Identifier: MacBookPro8,1

Processor Name: Intel Core i5

Processor Speed: 2.3 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache (per Core): 256 KB

L3 Cache: 3 MB

Memory: 8 GB

Boot ROM Version: MBP81.004D.B00

SMC Version (system): 1.68f99


At the moment, I do not know what to blame for the problems - hardware or software, or both?


Any suggestions or clues, please!

Jan 27, 2018 5:23 PM in response to ayn

I somehow got my macbook back to Sierra. I quadrupled the ram. I think I got to it hard internet wired, via recovery. Sierra is fine. If you google the difference there's barely any between Sierra and High Sierra from a users standpoint. They improved siri which I never use on the laptop. And there's a new file system but the advantage is only seen on a fixed hard drive.


it's working great now and I ain't changing to High Sierra! why?

Feb 3, 2018 8:13 AM in response to ODUSunshine

I am starting to seriously consider retreating to Sierra as well. After updating to 10.13.3 yesterday, this morning the Mini (2012) stalled on the progress bar again. My hope that the update would help was obviously vain. Decided it was time for the occasional visit to Disk Utility via recovery mode. As usual, First Aid found nothing wrong in any of my three partitions. The Mini managed to restart after that, but it was excruciatingly slow. This stupid problem is becoming quite intolerable.

Feb 6, 2018 7:24 AM in response to MSPhop

Hello all I am in the same boat as many here have a 2010 Mac book pro and after the High Sierra update it is stuck on the progress bar and have tried pretty much all the first aid fix it’s, reinstalls, reboots etc here and spoke to Apple today who suggested I thunderbolt it to another Mac here and copy data over and reinstall. There is one thing I would like to try before that it is the kext file issue but I am totally thick with Terminal window in recovery mode when I type what some people have suggested on here to bring up the non-Apple kext files it does not recognise what I have inputted. I am guessing I am doing the whole thing wrong. If anyone knows of a total idiots guide to using Terminal in RMode and getting it to list the non-Appls kextList.txt file let me know. I have a Genius Bar appointment tomorrow not holding out much hope than having to buy an external hard drive .......😕

Feb 7, 2018 5:44 PM in response to Philly_Phan

Obviously the machine is not too old, or I wouldn't have been able to install High Sierra.


High Sierra was an OS update meant to focus on improving performance and fixing bugs. These machines had no problems running Sierra.


Too old is only an excuse that salesmen use to upsell. Unless in fact there is a failing hardware problem like memory or hard disk. Still, with many people experiencing this problem due to an OS upgrade, it seems likely there are just some bugs that Apple needs to iron out. This stuff happens. I have a Computer Science degree and used to build computers from scratch, I think I can evaluate if a machine is just TOO OLD.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Progress Bar Stuck on 100% on boot High Sierra

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.