High Sierra install is frozen

That boots from the recovery partition, where you can troubleshoot, it will install Sierra I presume, as High Sierra isn't even installed on your computer. The procedure Benny B explains (hard reboot) works well if your installer is stuck, I had to do that as well.

I kept shutting down and kemp trying to start up in the restore mode the software update also seemed to screw up this as well but eventually I managed to get the restore mode up and restored back to 10.12.6. The restore mode took a little time to load so as long as you have a backup you should with patience be able to restore. Tried the high update twice and in my experience it will not load on 10.12.6 even after leaving for a very long period apple as screwed it up.

Hope you restore your back to life, good luck

From what I have read if you have been running 10.12.6 (like Beta testers) then the new upgrade will not load and will just freeze so do not try until apple respond and say the problem as been fixed. To be honest after the freeze I could not get into the safe mode and it took a few tries to get my iMac to startup in the restore mode so I could restore. Back on 10.12.6 so after trying to upgrade twice and losing the use of my iMac for a couple of days I will not try again until apple says it is now safe for all to update. I have not read any response from apple on this so I can only presume they are working on a fix then I may try again, funny this is as a Beta tester when I saw there is an upgrade ready to install I just clicked on restart as normal. Couple of days later and hours of wasted time I had to restore to get use back again, thanks apple

I could never get mine into safe mode but after a lot of reboots and unplugging then restarting on my iMac mid 2010 I used

Fn, ctrl, Cmd and R

and after a lot of attempts I was happy to at last see the restore option come up and managed to restore from my backup USB drive.

Good luck this upgrade as been a real pain just does not load on some machines I was and still am after the back up running 10.12.6 and unless apple come clean and say they have a working upgrade I will not try again

Some additional info: I went in recovery mode with cmd + r and deleted the disk for a clean installation. I selectede journaled..., but then the high sierra indtall failed after reboot. Then I went to recovery mode and selected indtructions in safari online. The clue is to read this manual. If you delete for my model afts(not sure if this was the correct name) must be selected when delete. Then I installed now it works!

Thanks. I was stuck at 95%. I shut down my mid 2011 iMac and then turned it back on. The progress bar was still there. I waited a few minutes and to my amazethe update completed quickly. I now have high Sierra. Wonderful.

I am seeing the same thing with my Macbook Air. It has been sitting in the middle of the install bar showing "calculating time remaining" for the last 14 hours.

I'd recommend no one upgrade yet until it is stable. It also fails on my Mac Pro.

in addition to that I have found in some occasions disconnecting anything thats not needed can help move the process along when it gets stuck. It's best to do this before you begin the install.

Its not uncommon for any and all OS X upgrades to get stuck in the last few minutes of the install and rebooting sometimes clears it up. this (bad) behavior is not exclusive to High Sierra but it's more the exception than the rule - at least I hope it is because I plan to clean install it on my 2010 Mac Pro when I leave for lunch and see what happens when I get back.

I had that took awhile to manage to get my iMac to start in restore mode just keep trying and I hope you have a restorable backup or you could be screwed. Have not seen anything from apple to explain why their new upgrade keeps bricking machines how could they have screwed up so much. You would have thought they would have warned people that the new upgrade will only go on top of versions up to and if you have version 10.12.6 then the upgrade is not for you.

MississippiMills keep trying and hopefully your get the restore screen again I can tell you when I saw that my heart fluttered, in the meantime thank apple for wasting so much time. Tell you what after releasing the right combination it took some time for the restore appeared for the first time.

Good luck

I selected to download High Sierra and on restart the progress bar stayed stuck a half way for 4 hours. Restarting in safe mode did not work. I took the mac to the genius bar, they could not get the machine to start in safe mode or diagnose the problem, the diagnostics indicated the hardware was ok. The tech wiped the hard drive and I restored my files from my cloud source. This is the second time this has happened on a software update. A genius bar appointment to wipe the hard drive is not a sustainable solution. I am currently running Sierra 10.12.6 on an early 2015 mac book.

Well as said I was and still running (after lucky enough to restore) 10.12.6 and lost my iMac for a couple of days after trying to upgrade. The issue is 10.12.6 and from what I have read its an hard drive issue 10.12.6 changes the way the hard drive stores files sadly the High upgrade does the same but will ONLY go on older versions not 10.12.6.

Still no news from apple as to why we cannot update the software. Read somewhere there is a solution that entails making a boot disk then formatting the drive installing High and then try and get you old files back, cheers apple but to much my me to try.

Why no response from apple saying why this is happening even that we can never upgrade again, BUT NOTHING from apple at all.

Got 10.12.6 then update at your own peril

good luck

I just upgraded my Mac mini (late 2012).

It rebooted at 44 mins remaining, came back and sat at 43 mins, and I thought it was frozen.

It did suddenly reboot an hour+ later, came back and sat with no time remaining indicator.

Eventually it started again and said completing installation 15 minutes remaining and counted down. At the end another warm start and it said loading photos and finally, my login screen.

Going through startup screens now. missing mouse pointer, but mouse click takes it out of screensaver...

Was on 10.12.6 without the 001 update on that release. Standard HDD. So this freeze issue is not all 10.12.6

Late 2012 Mac mini

i5, 2.5 4G ram, 500G HD

Interesting tried twice the last lite left overnight for 8 hours then I unplugged and started still the same frozen page and I was out for another 9 hours so the second attempt was 17 hours plus trying to get the restore back on screen. A total nightmare lost the used of my iMac for a couple of days but lucky enough I am now back on 10.12.6 and restored to my backup. No idea if the new release from apple is any better I cannot afford to lose my iMac again for such a long time. No news from apple to say the latest upgrade will sort things out so for now I have a running machine.

All I can say is it took me a lot of tries to get mine back into restore mode and every time it would not I would unplug and leave it for 15 seconds before I tried again. Don't give up hope keep trying when it did restore I was so happy it was like getting a new machine. This upgrade as been a nightmare not only to you or myself but to others too, your not alone keep trying.

Good luck