High Sierra bricked my iMac .. com.apple.DiskManagement error 0

Obviously conserving your data is most important. You need at least Time Machine backup and if possible an external bootable clone as well. Carbon Copy Cloner is one well known app for this.

If you also copy the High Sierra (HS) installer on to the clone disk, it can be used to erase, repair, reformat, reinstall and migrate back, your system.

Booting from outside your system and running Disk Utility (DU) "First Aid" from there, may solve the disk error problem, where using the Recovery Partition is limited. By the way, in the DU View menu, select "Show all Devices", and run the first Aid on each volume shown. The main disk often passes ok with errors needing to be fixed on the OS volume itself.

If you have not used APFS and your HDD's are still with HFS+, erasing and reformatting may not be required and the disk may repair ok.

If you cannot now access your computer, maybe a friend's clone could be used for the repairs and running the installer again. Unless you actually erase the disk, your user account should still be be there.

I was stuck in this loop myself. When I got to the screen that says it couldn't be installed and to restart, I went into utilities (menu that eventually appears at the top) and ran first aid on my main disk (not the partition, the whole disk). It showed no problems with the disk. After this I quit the utilities, and it started rebooting. It was stuck on the black progress bar for a long time, before it finally calculated how long it would take to install. In other words, even though it said it couldn't install it, it did. Hope this helps! Good luck!

I had the same failure. Each reboot just went right back to the installer - no way to just boot back into Sierra. Installing from recovery mode didn't work either, same error.

After a long day of frustration, I gave up and reinstalled Sierra from a bootable USB stick. Unfortunately, in its great wisdom Apple seems to have made Sierra impossible to find. Luckily I was able to find a friend who still had the installer. But this did work and I have my Mac back again.

My system is a late 2012 Mac Mini. I would like to upgrade to High Sierra, but won't try again until I have some time on my hands to repeat the Sierra installation (if needed).

Hooray, my strategy with reinstalling 10.12.6 from a bootable USB worked OK so now at least I have my 27" iMac back (with no apparent software loss). Now that I know that I can restore the 10.12.6 OS I will try to upgrade my other Macs to 10.13 but I reckon to wait a few days to see if Apple read these posts and, more imporrtantly, do something about it!

Hi,

maybe you can find a USB stick preloaded with Sierra Installer on internet shops. Am*z@n?😉

Here is how I managed to restore full operation:

1. Take MacBook with El Capitan and create clone to USB disk

2. Boot bricked iMac from USB disk.

3. Login, goto AppStore and load from purchased items the Sierra Installer.

4. Start installer and select internal disk of iMac.

-> After installation back as before the loop of death. All data preserved.

PM: I have the Sierra Installer (5 GB) on my USB drive. 😉

This was exactly my problem. Fortunately I completed a Time Machine backup just before the attempt to install High Sierra. After 8 hours (including several on the phone with Apple), I gave up and restored from the Time Machine. Amazingly that went flawlessly and the system is whole again.

One Odd note, when the restore was done, I ended up with about 80 GB more Free Space on 'Macintosh HD' than I had before I attempted the High Sierra Installation.

However, I too have a Late 2012 iMac27 so I think this installation failure might not be a coincidence and will hold off on another attempt until a DOT revision ... the new security fix is supposed to be included on the next revision anyway.

Sierra: 10.12.6 (16G29)

iMac (27-inch, Late 2012)

2.9 GHz Intel Core i5

32 GB 1600 MHz DDR3

Situation Update: It worked!

OK! They released a new build of 10.13 earlier this week so I waited a few days and gave it a try today.

The installation went flawlessly and so far everything looks great.

Oddly, after the installation, I ended up with about 15 GB more free space on my HD and the systems seems quicker ... Even on the first and second boots, and that's unusual based on past experience.

Previous comment from October 3:

This was exactly my problem. Fortunately I completed a Time Machine backup just before the attempt to install High Sierra. After 8 hours (including several on the phone with Apple, I gave up and restored from the Time Machine. Amazingly that went flawlessly and the system is whole again.

One Odd note, when the restore was done, I ended up with about 80 GB more than I had when I attempted the High Sierra Installation.

However, I too have a Late 2012 iMac27 so I think this might be a coincidence and will hold off on another attempt for a while.

Sierra: 10.12.6 (16G29)

iMac (27-inch, Late 2012)

2.9 GHz Intel Core i5

32 GB 1600 MHz DDR3

You don't have to erase your disk. Your data is safe, even when the com.apple.DiskManagement error 0 appears. You need macOS Sierra, the former not the latter High Sierra, have it in an USB, restart your computer erasing PRAM, then restart it again with command-R, choose reinstall OS from USB, then you'll end up with the old macOS Sierra and your data intact. I did that since I tried to install High Serra unsuccessfully on launch day, when my computer got the infamous install error. Now, I'm still waiting for High Sierra to be more mature to give it a try again, whereas I'm writing this post in my usable MacBook Pro pretty fine.

My first attempt failed (Mac Mini Late 2012, HDD) but I retried with the updated installer from the App Store (dated 5th October) and that worked fine.

So, it's either just luck, or the failed install/restore from TM corrected something wrong on my HD, or Apple fixed something in the installer.

I think the 10.13.1 will be out soon and maybe will get some clarity from Apple on what the problem was and what they have changed.

I was stuck in the terrifying loop of "Startup Chime -> Weird error message and loading bar for 2 seconds -> Repeat"

I used cmd-R and was taken to the Utilities screen where I was able to restore from backup. Luckily, I had made a backup about an hour before installing.

I used Internet recovery (cmd-opt-R) and Yosemite is what I was given. I would have preferred to have been given Sierra since Yosemite wouldn't allow me to log in but at least I'm up and running now.

Ditto mid 2011 iMac bricked and stuck in install fail loop with com.apple.DiskManagement error 0. Managed to recover from time machine backup on external drive but that's a day and a half without my iMac that I could have done without. . . off topic but I also encountered a problem with opening an xls file on my iPhone on iOS 11 that opened fine on iOS 10 - symptom was major heating of the phone and battery drained to 15% in about 5 minutes. Come on Apple, sort it out!

I've got the same issue as well. DiskManagement error 0 after some time of attempting to install. When I tried Internet recovery, it took me back to Yosemite which, unfortunately, got stuck in a loop on the log in screen. I was able to download the Sierra installer from a Mac at work and re-install that and everything is working fine now but I'd really like to upgrade to High Sierra. Guess I'll have to be patient and wait for a fix.

The updated version of High Sierra installed just fine on my 2012 Mac Mini. It paused for some time at 43 minutes, as it did with the first version, but this time no com.apple.DiskManagement error 0.

I see it didn't work for everybody… in my case I had restored the computer to a working copy of Sierra and deleted the original installer. Are the new failures starting from recovery? I wonder if the installer just tries to reuse the bad version that had already been downloaded? My suggestion is to try again with a freshly downloaded copy on a bootable USB stick.

Maybe too late, download Sierra from your purchased apps in App Store and reinstall it, no data lost.