I'm stuck in a loop. Installation in progress then it freezes prompting a restart. The restart start the process all over only to freeze again. I'm on my third try... am I off to see a Genius?
com.apple.DiskManagement error 0
iMac, macOS High Sierra (10.13), installation
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.
No too late... thanks for the idea, but Sierra isn't available in "My Purchases". Called into my Support Rep the day before his work week started and still haven't heard back. My iMac is a sculpture presently, sitting idle and operating in a very green way - it's been off a week. I'd like to get it working next week but I'm not holding my breathe. I'm not keen to do a clean install.... I might need to find another user and send them a thumb drive to get Sierra.
A new twist... I borrowed a 16gb usb stick and started up my mac in Internet recovery mode (shift, option command) .. got to the MacOS utilities screen, formatted the usb as journelled as discussed on the phone with Apple support. Was really hopeful, went through same routine, finally got to the grey screen with the progress Bar ... and boom, I install failed as not enough space on the drive..... it’s got 16gb!!!!!!
Regards Dave.
Yes this may be the case but why should you want to put a faulty version of MacOS High Sierra on a USB. It's MacOS Sierra that you need first so that you can revert when you get into the com.apple.DiskManagement error 0 loop.
I attempted with a 128GB USB. Via disk mode on the bricked iMac, I was able to clear 100Gb of storage. Now I'm sitting with close to 220Gb available but I've not turned the thing back on. Not sure what I'd do until theres a dot1 release. No reply either from Apple Support despite two attempts.
Still amazed - and candidly, angry - that this is the first install to fail. This level of support or failure isn't something I've seen from Apple, ever.
I have these versions too in my 'Purchase History' I did post some hints on where 'Sierra' might be found but it appears that I have been a bad boy and my post has been deleted. All I can say to you is 'Seek and ye shall find' - The truth is out there.
Just tried again with a fresh copy since there was a new release. In a milestone moment, I got to 43 minutes remaining until the dreaded DiskManagement Error 0.
HEY APPLE. MY COMPUTER IS UNUSABLE. ARE YOU GONNA CALL BACK?
I have a time machine.... for some reason it has not updated since the end of May. That's another little surprise I found when this fiasco started. I'm a little anxious about trusting that copy.
Despite the best efforts of the tech I spoke to today, I'm really stuck now. My machine will only boot into the install process - I cannot get it to target mode.
The (super sarcastic) good news, I have a genius appointment right around the corner, its Saturday.
I'm disappointed and then some. This is the first failure and it's simply been fantastic, complete and over the top. I guess I sit tight until Saturday.
Indeed you do have the latest (updated) version and I have seen posts that have installed this successfully. I was getting around to trying it on my 15"MBP but I think that I will wait until 13.1 emerges (in developer Beta as we speak) and then see if the forums erupt with more problems. What with High Sierra and IOS 11 (now in 3rd release) I am rapidly loosing faith in Apple. I have already sold all of my Apple shares.
Apple, I as well am rather tech savvy. I have 12 terabytes of sensitive information cleared out. I purchased a brand new HDD as well. Bricked immediately. I would like to know what kind of compensation package you're putting together for this?
May I know how's your installation method? have you tried reinstall it using a disk installer such as ext HDD or flash disk?
same here very angry. what is this Microsoft???
I have the same problem, hope Apple will come with a fix ASAP!
Same happening to my 27" iMac. Have tried similar approaches to what others have stated. Still nothing.
Is there a way to download Sierra? It's not in the App Store anymore.
Does Putnik's answer (above) work for finding old installers?
High Sierra bricked my iMac .. com.apple.DiskManagement error 0
