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

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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

Dec 3, 2017 12:26 AM in response to fpuk69

I have the same problem.


My Mac Mini (Late 2014) was originally unable to upgrade High Sierra because of the "cannot unmount disk" error, brought it to Genius Bar and did a fresh install and it was able to boot for a few times.


I then recovered my data from a Time Machine backup and in turn starts up Docker and Virtual Box, it is where it gets unstable and the VM is crashing. So I went ahead for a soft reboot, it is when it stuck at 100% on boot.


My gut feeling is that APFS is not that HDD friendly and refuse to mount every now and then.

Dec 11, 2017 12:30 PM in response to fpuk69

Had this same problem after doing my usual update procedure once High Sierra had hit .2. I wipe the drive, do a clean install, then do a migrate from a Time Machine backup to bring my stuff back. Hasn't failed...until now.


Even booting Safe Mode didn't work (would still hang). Finally ended up reinstalling High Sierra again over this newly-upgraded installation, which did the trick.

Dec 11, 2017 1:05 PM in response to fpuk69

I'm having similar problems. It started happening after beta 4 install (for 10.13.2). After installing beta 4 the next reboot resulting in a continue reboot cycle after entering the password to decrypt the startup disk. It didn't matter if I booted to the recovery partition and ran check disk or reset NVRAM. Same problem with beta 5,6 & the release version. I submitted a bug report ~ several weeks ago I got no response. With the release of 10.13.2 it caused both of my 2013& 2014 rMBP to do the same thing. Even when I used the recovery partition to reinstall 10.13.2 it didn't make any difference. I ended up booting to safe mode to try & track the problem down. I have the sysdiag dumps & trying to track down what is happening. It appears something is loading at the point the disk is being decrypted that crashes the system. Strange that it started after beta 4. Apple changed something.

Dec 11, 2017 2:12 PM in response to fpuk69

Just had the same issue. Was working fine, shut down, restarted and progress bar stuck at 100% and then went nowhere. I rebooted using my previous Sierra external drive, went to disk utilities, picked repair disk and it said found errors and after rebooted on internal drive and now OK again. Not sure how long this will last. I have 10.13.2.

Dec 11, 2017 4:24 PM in response to hamosity

And after a weekend leaving it in sleep mode, I returned to work, was able to type in my password... and nothing, just the password window and nothing happening. Finally re-booted in Safe Mode, ran Disk Utilities and supposedly it found an issue. I restarted normally and so far OK. We'll see. I've never had an upgrade go wrong. 10.13.1 seems to have glitches.

Dec 16, 2017 11:17 AM in response to concordiadiscors

First of all, I changed the DNS of my router to 8.8.8.8 after that Internet Recover start working. Before it was not working. After internet start working I tried to clean install the High Sierra through Internet. But same problem happen again. Stucked at 35%. Then I again reboot to internet recovery and format my Hard drive completely and install again. This time I was successful. ALHAMD O LILLAH

Dec 18, 2017 6:35 AM in response to JeanFL

I also have this problem. Started on December 17th (yesterday). I chatted and talked on the phone with Apple support and all the efforts didn’t resolve the problem. It took 4 hours to reinstall High Siera and it went back to the same progress bar. Left it on over night still no log in page. I don’t have the time back up so I don’t know what’s going to happen now. I have three years of art work on my hard drive. The only suspicious things I saw on my Mac in the last month or so was a warning about a virus. I restarted my computer and it was fine after. I paid it no mind because I was always told macs don’t get viruses. This is also my first Mac. I’m going to a Genius Bar soon and hope they have a solution. I can’t afford to get a new Mac so I need this fixed and hopefully I can get my art works back. I’m really upset about this.

Dec 30, 2017 12:24 PM in response to catwigs

I went to an Apple Store and they could not save my files. They restored it to its original OS and then I had to bring it home an install the new OS. Its a two day process, upgrading to High Sierra takes about 19 hours. My computer has been working like the day I bought it. Only thing is I lost all my files that were on my desktop. So now I'm trying to figure out if there's a way to retrieve those files. The tech at the store said there's a way to get them but I would have to go to another tech place. Also, The Apple Store didn't charge me anything because OS related issues are free of charge.

Dec 30, 2017 10:21 PM in response to fpuk69

I encountered something similar after a system update on 10.12.6 (Sierra, not High Sierra). The symptoms were the same, however, booting to 100% progress bar, then never completing.


I had two backups, one Time Machine and the other a SuperDuper clone.


After booting into Recovery and re-installing the OS but with the same problem, I then ERASED the boot disk entirely and reinstalled a fresh, clean OS. I then, on first boot, migrated everything from the Time Machine backup. The problem returned!


I then theorized that some kext or some other installed extension had caused the problem, so I had maybe just migrated the problem back to the new clean system.


I then repeated the erase and fresh install, but this time on first initial boot, I skipped EVERYTHING except to create one admin user account, nothing else. Then I applied all available system updates, including the one that led to the problem. Rebooting after that worked fine. I thus had a plain vanilla system with one admin user, no user files, and nothing installed except Apple original software.


Then I used Migration Assistant to migrate ONLY user accounts and user files, no settings and no applications. Then I proceeded to reinstall only some applications from scratch, such as MS-Office, Adobe Lightroom, TurboTax, and a few others, but not everything from before. After a week or so, everything seems ok.


Not sure this will resolve your issue in High Sierra, but if it is caused by something installed or a bad kext or some similar thing, the clean install followed by Migration of only user accounts and user files prevents that corruption from being brought over. The downside is reinstalling all one's software, but I found that to be fairly straightforward and not very time consuming in fact.

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Progress Bar Stuck on 100% on boot High Sierra

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