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I had this problem when I was on High Sierra, so I copied my files on a hard drive and installed El Capitan. I'm just curious now — was that error recoverable? What I did: reset VRAM, reset SMC, repair startup disc, reinstall MacOS, fix file system and nothing helped.

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This solution worked for my MacBook Pro: https://mrsystems.co.uk/blogs/news/too-many-corpses-being-created

Steps from the article:

  1. boot and hold cmd-R to start up from macOS Recovery
  2. If Filevault is on, mount the disk with Disk Utility and password
  3. Run these two in Terminal
  4. cd /Volumes/Macintosh\ HD/var/db/caches/opendirectory
  5. mv ./mbr_cache ./mbr_cache-old
  6. Restart
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  • Thanks @Aïssa Ghouti! – Deepak Carpenter Apr 14 '20 at 17:51
  • If you are using the non-apple keyboard then you will not able to go in Recovery mode So, Please use Apple keyboard – Hasan Mohd Khan Sep 4 '20 at 4:36
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YES THIS ALSO WORKED FOR ME

on my Imac (27-inch Late 2013): https://mrsystems.co.uk/blogs/news/too-many-corpses-being-created

Steps from the article:

  1. boot and hold cmd-R to start up from macOS Recovery
  2. If Filevault is on, mount the disk with Disk Utility and password
  3. Run these two in Terminal
  4. cd /Volumes/"YOUR HDD NAME"/var/db/caches/opendirectory
  5. mv ./mbr_cache ./mbr_cache-old
  6. Restart

NOTING: that the first boot after these steps will take more than usual time as the system it building new cache file , But after that it will return to bot normally

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  • couldn't find /caches folder – Kuhan Jul 31 '18 at 5:42
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This solution worked for my MacBook Pro a well: https://mrsystems.co.uk/blogs/news/too-many-corpses-being-created

Steps from the article:

boot and hold cmd-R to start up from macOS Recovery If Filevault is on, mount the disk with Disk Utility and password Run these two in Terminal

cd /Volumes/Macintosh\ HD/var/db/caches/opendirectory
mv ./mbr_cache ./mbr_cache-old

Restart

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1
  • This worked perfectly using those 2 commands in terminal without issue for me! Thank you – Patrick May 14 '18 at 21:28

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